366 lines
7.6 KiB
PHP
366 lines
7.6 KiB
PHP
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<?php namespace Illuminate\Support;
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use RuntimeException;
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use Stringy\StaticStringy;
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use Illuminate\Support\Traits\Macroable;
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class Str {
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use Macroable;
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/**
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* The cache of snake-cased words.
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*
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* @var array
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*/
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protected static $snakeCache = [];
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/**
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* The cache of camel-cased words.
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*
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* @var array
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*/
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protected static $camelCache = [];
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/**
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* The cache of studly-cased words.
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*
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* @var array
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*/
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protected static $studlyCache = [];
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/**
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* Transliterate a UTF-8 value to ASCII.
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*
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* @param string $value
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* @return string
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*/
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public static function ascii($value)
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{
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return StaticStringy::toAscii($value);
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}
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/**
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* Convert a value to camel case.
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*
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* @param string $value
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* @return string
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*/
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public static function camel($value)
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{
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if (isset(static::$camelCache[$value]))
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{
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return static::$camelCache[$value];
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}
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return static::$camelCache[$value] = lcfirst(static::studly($value));
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}
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/**
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* Determine if a given string contains a given substring.
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*
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* @param string $haystack
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* @param string|array $needles
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* @return bool
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*/
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public static function contains($haystack, $needles)
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{
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foreach ((array) $needles as $needle)
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{
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if ($needle != '' && strpos($haystack, $needle) !== false) return true;
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}
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return false;
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}
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/**
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* Determine if a given string ends with a given substring.
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*
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* @param string $haystack
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* @param string|array $needles
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* @return bool
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*/
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public static function endsWith($haystack, $needles)
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{
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foreach ((array) $needles as $needle)
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{
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if ((string) $needle === substr($haystack, -strlen($needle))) return true;
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}
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return false;
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}
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/**
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* Cap a string with a single instance of a given value.
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*
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* @param string $value
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* @param string $cap
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* @return string
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*/
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public static function finish($value, $cap)
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{
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$quoted = preg_quote($cap, '/');
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return preg_replace('/(?:'.$quoted.')+$/', '', $value).$cap;
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}
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/**
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* Determine if a given string matches a given pattern.
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*
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* @param string $pattern
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* @param string $value
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* @return bool
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*/
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public static function is($pattern, $value)
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{
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if ($pattern == $value) return true;
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$pattern = preg_quote($pattern, '#');
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// Asterisks are translated into zero-or-more regular expression wildcards
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// to make it convenient to check if the strings starts with the given
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// pattern such as "library/*", making any string check convenient.
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$pattern = str_replace('\*', '.*', $pattern).'\z';
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return (bool) preg_match('#^'.$pattern.'#', $value);
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}
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/**
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* Return the length of the given string.
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*
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* @param string $value
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* @return int
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*/
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public static function length($value)
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{
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return mb_strlen($value);
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}
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/**
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* Limit the number of characters in a string.
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*
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* @param string $value
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* @param int $limit
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* @param string $end
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* @return string
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*/
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public static function limit($value, $limit = 100, $end = '...')
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{
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if (mb_strlen($value) <= $limit) return $value;
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return rtrim(mb_substr($value, 0, $limit, 'UTF-8')).$end;
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}
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/**
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* Convert the given string to lower-case.
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*
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* @param string $value
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* @return string
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*/
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public static function lower($value)
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{
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return mb_strtolower($value);
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}
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/**
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* Limit the number of words in a string.
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*
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* @param string $value
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* @param int $words
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* @param string $end
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* @return string
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*/
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public static function words($value, $words = 100, $end = '...')
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{
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preg_match('/^\s*+(?:\S++\s*+){1,'.$words.'}/u', $value, $matches);
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if ( ! isset($matches[0]) || strlen($value) === strlen($matches[0])) return $value;
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return rtrim($matches[0]).$end;
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}
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/**
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* Parse a Class@method style callback into class and method.
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*
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* @param string $callback
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* @param string $default
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* @return array
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*/
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public static function parseCallback($callback, $default)
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{
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return static::contains($callback, '@') ? explode('@', $callback, 2) : array($callback, $default);
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}
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/**
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* Get the plural form of an English word.
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*
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* @param string $value
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* @param int $count
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* @return string
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*/
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public static function plural($value, $count = 2)
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{
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return Pluralizer::plural($value, $count);
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}
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/**
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* Generate a more truly "random" alpha-numeric string.
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*
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* @param int $length
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* @return string
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*
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* @throws \RuntimeException
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*/
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public static function random($length = 16)
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{
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if ( ! function_exists('openssl_random_pseudo_bytes'))
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{
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throw new RuntimeException('OpenSSL extension is required.');
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}
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$bytes = openssl_random_pseudo_bytes($length * 2);
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if ($bytes === false)
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{
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throw new RuntimeException('Unable to generate random string.');
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}
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return substr(str_replace(array('/', '+', '='), '', base64_encode($bytes)), 0, $length);
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}
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/**
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* Generate a "random" alpha-numeric string.
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*
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* Should not be considered sufficient for cryptography, etc.
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*
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* @param int $length
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* @return string
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*/
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public static function quickRandom($length = 16)
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{
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$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
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return substr(str_shuffle(str_repeat($pool, $length)), 0, $length);
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}
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/**
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* Convert the given string to upper-case.
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*
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* @param string $value
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* @return string
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*/
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public static function upper($value)
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{
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return mb_strtoupper($value);
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}
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/**
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* Convert the given string to title case.
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*
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* @param string $value
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* @return string
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*/
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public static function title($value)
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{
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return mb_convert_case($value, MB_CASE_TITLE, 'UTF-8');
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}
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/**
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* Get the singular form of an English word.
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*
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* @param string $value
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* @return string
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*/
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public static function singular($value)
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{
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return Pluralizer::singular($value);
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}
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/**
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* Generate a URL friendly "slug" from a given string.
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*
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* @param string $title
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* @param string $separator
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* @return string
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*/
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public static function slug($title, $separator = '-')
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{
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$title = static::ascii($title);
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// Convert all dashes/underscores into separator
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$flip = $separator == '-' ? '_' : '-';
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$title = preg_replace('!['.preg_quote($flip).']+!u', $separator, $title);
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// Remove all characters that are not the separator, letters, numbers, or whitespace.
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$title = preg_replace('![^'.preg_quote($separator).'\pL\pN\s]+!u', '', mb_strtolower($title));
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// Replace all separator characters and whitespace by a single separator
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$title = preg_replace('!['.preg_quote($separator).'\s]+!u', $separator, $title);
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return trim($title, $separator);
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}
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/**
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* Convert a string to snake case.
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*
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* @param string $value
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* @param string $delimiter
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* @return string
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*/
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public static function snake($value, $delimiter = '_')
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{
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$key = $value.$delimiter;
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if (isset(static::$snakeCache[$key]))
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{
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return static::$snakeCache[$key];
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}
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if ( ! ctype_lower($value))
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{
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$value = strtolower(preg_replace('/(.)(?=[A-Z])/', '$1'.$delimiter, $value));
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}
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return static::$snakeCache[$key] = $value;
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}
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/**
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* Determine if a given string starts with a given substring.
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*
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* @param string $haystack
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* @param string|array $needles
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* @return bool
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*/
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public static function startsWith($haystack, $needles)
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{
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foreach ((array) $needles as $needle)
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{
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if ($needle != '' && strpos($haystack, $needle) === 0) return true;
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}
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return false;
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}
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/**
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* Convert a value to studly caps case.
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*
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* @param string $value
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* @return string
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*/
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public static function studly($value)
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{
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$key = $value;
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if (isset(static::$studlyCache[$key]))
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{
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return static::$studlyCache[$key];
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}
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$value = ucwords(str_replace(array('-', '_'), ' ', $value));
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return static::$studlyCache[$key] = str_replace(' ', '', $value);
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}
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}
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