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PHP Cross Reference of WordPress |
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WordPress implementation for PHP functions either missing from older PHP versions or not included by default.
| File Size: | 499 lines (15 kb) |
| Included or required: | 0 times |
| Referenced: | 0 times |
| Includes or requires: | 1 file wp-includes/sodium_compat/autoload.php |
| _( $message ) X-Ref |
| No description |
| _wp_can_use_pcre_u( $set = null ) X-Ref |
| Returns whether PCRE/u (PCRE_UTF8 modifier) is available for use. param: bool $set - Used for testing only since: 4.2.2 |
| mb_substr( $string, $start, $length = null, $encoding = null ) X-Ref |
| Compat function to mimic mb_substr(). return: string Extracted substring. param: string $string The string to extract the substring from. param: int $start Position to being extraction from in `$string`. param: int|null $length Optional. Maximum number of characters to extract from `$string`. param: string|null $encoding Optional. Character encoding to use. Default null. since: 3.2.0 |
| _mb_substr( $str, $start, $length = null, $encoding = null ) X-Ref |
| Internal compat function to mimic mb_substr(). Only understands UTF-8 and 8bit. All other character sets will be treated as 8bit. For `$encoding === UTF-8`, the `$str` input is expected to be a valid UTF-8 byte sequence. The behavior of this function for invalid inputs is undefined. return: string Extracted substring. param: string $str The string to extract the substring from. param: int $start Position to being extraction from in `$str`. param: int|null $length Optional. Maximum number of characters to extract from `$str`. param: string|null $encoding Optional. Character encoding to use. Default null. since: 3.2.0 |
| mb_strlen( $string, $encoding = null ) X-Ref |
| Compat function to mimic mb_strlen(). return: int String length of `$string`. param: string $string The string to retrieve the character length from. param: string|null $encoding Optional. Character encoding to use. Default null. since: 4.2.0 |
| _mb_strlen( $str, $encoding = null ) X-Ref |
| Internal compat function to mimic mb_strlen(). Only understands UTF-8 and 8bit. All other character sets will be treated as 8bit. For `$encoding === UTF-8`, the `$str` input is expected to be a valid UTF-8 byte sequence. The behavior of this function for invalid inputs is undefined. return: int String length of `$str`. param: string $str The string to retrieve the character length from. param: string|null $encoding Optional. Character encoding to use. Default null. since: 4.2.0 |
| hash_hmac( $algo, $data, $key, $binary = false ) X-Ref |
| Compat function to mimic hash_hmac(). The Hash extension is bundled with PHP by default since PHP 5.1.2. However, the extension may be explicitly disabled on select servers. As of PHP 7.4.0, the Hash extension is a core PHP extension and can no longer be disabled. I.e. when PHP 7.4.0 becomes the minimum requirement, this polyfill and the associated `_hash_hmac()` function can be safely removed. return: string|false The hash in output determined by `$binary`. param: string $algo Hash algorithm. Accepts 'md5' or 'sha1'. param: string $data Data to be hashed. param: string $key Secret key to use for generating the hash. param: bool $binary Optional. Whether to output raw binary data (true), since: 3.2.0 |
| _hash_hmac( $algo, $data, $key, $binary = false ) X-Ref |
| Internal compat function to mimic hash_hmac(). return: string|false The hash in output determined by `$binary`. param: string $algo Hash algorithm. Accepts 'md5' or 'sha1'. param: string $data Data to be hashed. param: string $key Secret key to use for generating the hash. param: bool $binary Optional. Whether to output raw binary data (true), since: 3.2.0 |
| hash_equals( $known_string, $user_string ) X-Ref |
| Timing attack safe string comparison. Compares two strings using the same time whether they're equal or not. Note: It can leak the length of a string when arguments of differing length are supplied. This function was added in PHP 5.6. However, the Hash extension may be explicitly disabled on select servers. As of PHP 7.4.0, the Hash extension is a core PHP extension and can no longer be disabled. I.e. when PHP 7.4.0 becomes the minimum requirement, this polyfill can be safely removed. return: bool Whether strings are equal. param: string $known_string Expected string. param: string $user_string Actual, user supplied, string. since: 3.9.2 |
| is_countable( $value ) X-Ref |
| Polyfill for is_countable() function added in PHP 7.3. Verify that the content of a variable is an array or an object implementing the Countable interface. return: bool True if `$value` is countable, false otherwise. param: mixed $value The value to check. since: 4.9.6 |
| is_iterable( $value ) X-Ref |
| Polyfill for is_iterable() function added in PHP 7.1. Verify that the content of a variable is an array or an object implementing the Traversable interface. return: bool True if `$value` is iterable, false otherwise. param: mixed $value The value to check. since: 4.9.6 |
| array_key_first( array $array ) X-Ref |
| Polyfill for array_key_first() function added in PHP 7.3. Get the first key of the given array without affecting the internal array pointer. return: string|int|null The first key of array if the array param: array $array An array. since: 5.9.0 |
| array_key_last( array $array ) X-Ref |
| Polyfill for `array_key_last()` function added in PHP 7.3. Get the last key of the given array without affecting the internal array pointer. return: string|int|null The last key of array if the array param: array $array An array. since: 5.9.0 |
| str_contains( $haystack, $needle ) X-Ref |
| Polyfill for `str_contains()` function added in PHP 8.0. Performs a case-sensitive check indicating if needle is contained in haystack. return: bool True if `$needle` is in `$haystack`, otherwise false. param: string $haystack The string to search in. param: string $needle The substring to search for in the haystack. since: 5.9.0 |
| str_starts_with( $haystack, $needle ) X-Ref |
| Polyfill for `str_starts_with()` function added in PHP 8.0. Performs a case-sensitive check indicating if the haystack begins with needle. return: bool True if `$haystack` starts with `$needle`, otherwise false. param: string $haystack The string to search in. param: string $needle The substring to search for in the `$haystack`. since: 5.9.0 |
| str_ends_with( $haystack, $needle ) X-Ref |
| Polyfill for `str_ends_with()` function added in PHP 8.0. Performs a case-sensitive check indicating if the haystack ends with needle. return: bool True if `$haystack` ends with `$needle`, otherwise false. param: string $haystack The string to search in. param: string $needle The substring to search for in the `$haystack`. since: 5.9.0 |
| Generated: Thu Nov 21 01:00:03 2024 | Cross-referenced by PHPXref 0.7.1 |