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pcre.php
<?php namespace Safe; use Safe\Exceptions\PcreException; /** * Returns the array consisting of the elements of the * array array that match the given * pattern. * * @param string $pattern The pattern to search for, as a string. * @param array $array The input array. * @param int $flags If set to PREG_GREP_INVERT, this function returns * the elements of the input array that do not match * the given pattern. * @return array Returns an array indexed using the keys from the * array array. * @throws PcreException * */ function preg_grep(string $pattern, array $array, int $flags = 0): array { error_clear_last(); $safeResult = \preg_grep($pattern, $array, $flags); if ($safeResult === false) { throw PcreException::createFromPhpError(); } return $safeResult; } /** * Searches subject for all matches to the regular * expression given in pattern and puts them in * matches in the order specified by * flags. * * After the first match is found, the subsequent searches are continued * on from end of the last match. * * @param string $pattern The pattern to search for, as a string. * @param string $subject The input string. * @param array|null $matches Array of all matches in multi-dimensional array ordered according to * flags. * @param int $flags Can be a combination of the following flags (note that it doesn't make * sense to use PREG_PATTERN_ORDER together with * PREG_SET_ORDER): * * * PREG_PATTERN_ORDER * * * Orders results so that $matches[0] is an array of full * pattern matches, $matches[1] is an array of strings matched by * the first parenthesized subpattern, and so on. * * * * * * ]]> * * The above example will output: * * example: , this is a test * example: , this is a test * ]]> * * * So, $out[0] contains array of strings that matched full pattern, * and $out[1] contains array of strings enclosed by tags. * * * * * If the pattern contains named subpatterns, $matches * additionally contains entries for keys with the subpattern name. * * * If the pattern contains duplicate named subpatterns, only the rightmost * subpattern is stored in $matches[NAME]. * * * * ]]> * * The above example will output: * * * [1] => bar * ) * ]]> * * * * * * * PREG_SET_ORDER * * * Orders results so that $matches[0] is an array of first set * of matches, $matches[1] is an array of second set of matches, * and so on. * * * * ]]> * * The above example will output: * * example: , example: * this is a test, this is a test * ]]> * * * * * * * PREG_OFFSET_CAPTURE * * * If this flag is passed, for every occurring match the appendant string * offset (in bytes) will also be returned. Note that this changes the value of * matches into an array of arrays where every element is an * array consisting of the matched string at offset 0 * and its string offset into subject at offset * 1. * * * * ]]> * * The above example will output: * * Array * ( * [0] => Array * ( * [0] => foobarbaz * [1] => 0 * ) * * ) * * [1] => Array * ( * [0] => Array * ( * [0] => foo * [1] => 0 * ) * * ) * * [2] => Array * ( * [0] => Array * ( * [0] => bar * [1] => 3 * ) * * ) * * [3] => Array * ( * [0] => Array * ( * [0] => baz * [1] => 6 * ) * * ) * * ) * ]]> * * * * * * * PREG_UNMATCHED_AS_NULL * * * If this flag is passed, unmatched subpatterns are reported as NULL; * otherwise they are reported as an empty string. * * * * * * Orders results so that $matches[0] is an array of full * pattern matches, $matches[1] is an array of strings matched by * the first parenthesized subpattern, and so on. * * * * * ]]> * * The above example will output: * * example: , this is a test * example: , this is a test * ]]> * * * So, $out[0] contains array of strings that matched full pattern, * and $out[1] contains array of strings enclosed by tags. * * * * The above example will output: * * So, $out[0] contains array of strings that matched full pattern, * and $out[1] contains array of strings enclosed by tags. * * If the pattern contains named subpatterns, $matches * additionally contains entries for keys with the subpattern name. * * If the pattern contains duplicate named subpatterns, only the rightmost * subpattern is stored in $matches[NAME]. * * * * ]]> * * The above example will output: * * * [1] => bar * ) * ]]> * * * * The above example will output: * * Orders results so that $matches[0] is an array of first set * of matches, $matches[1] is an array of second set of matches, * and so on. * * * * ]]> * * The above example will output: * * example: , example: * this is a test, this is a test * ]]> * * * * The above example will output: * * If this flag is passed, for every occurring match the appendant string * offset (in bytes) will also be returned. Note that this changes the value of * matches into an array of arrays where every element is an * array consisting of the matched string at offset 0 * and its string offset into subject at offset * 1. * * * * ]]> * * The above example will output: * * Array * ( * [0] => Array * ( * [0] => foobarbaz * [1] => 0 * ) * * ) * * [1] => Array * ( * [0] => Array * ( * [0] => foo * [1] => 0 * ) * * ) * * [2] => Array * ( * [0] => Array * ( * [0] => bar * [1] => 3 * ) * * ) * * [3] => Array * ( * [0] => Array * ( * [0] => baz * [1] => 6 * ) * * ) * * ) * ]]> * * * * The above example will output: * * If this flag is passed, unmatched subpatterns are reported as NULL; * otherwise they are reported as an empty string. * * If no order flag is given, PREG_PATTERN_ORDER is * assumed. * @param int $offset Orders results so that $matches[0] is an array of full * pattern matches, $matches[1] is an array of strings matched by * the first parenthesized subpattern, and so on. * * * * * ]]> * * The above example will output: * * example: , this is a test * example: , this is a test * ]]> * * * So, $out[0] contains array of strings that matched full pattern, * and $out[1] contains array of strings enclosed by tags. * * * * The above example will output: * * So, $out[0] contains array of strings that matched full pattern, * and $out[1] contains array of strings enclosed by tags. * * If the pattern contains named subpatterns, $matches * additionally contains entries for keys with the subpattern name. * * If the pattern contains duplicate named subpatterns, only the rightmost * subpattern is stored in $matches[NAME]. * * * * ]]> * * The above example will output: * * * [1] => bar * ) * ]]> * * * * The above example will output: * @return 0|positive-int Returns the number of full pattern matches (which might be zero). * @throws PcreException * */ function preg_match_all(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): int { error_clear_last(); $safeResult = \preg_match_all($pattern, $subject, $matches, $flags, $offset); if ($safeResult === false) { throw PcreException::createFromPhpError(); } return $safeResult; } /** * Searches subject for a match to the regular * expression given in pattern. * * @param string $pattern The pattern to search for, as a string. * @param string $subject The input string. * @param null|string[] $matches If matches is provided, then it is filled with * the results of search. $matches[0] will contain the * text that matched the full pattern, $matches[1] * will have the text that matched the first captured parenthesized * subpattern, and so on. * @param int $flags flags can be a combination of the following flags: * * * PREG_OFFSET_CAPTURE * * * If this flag is passed, for every occurring match the appendant string * offset (in bytes) will also be returned. Note that this changes the value of * matches into an array where every element is an * array consisting of the matched string at offset 0 * and its string offset into subject at offset * 1. * * * * ]]> * * The above example will output: * * Array * ( * [0] => foobarbaz * [1] => 0 * ) * * [1] => Array * ( * [0] => foo * [1] => 0 * ) * * [2] => Array * ( * [0] => bar * [1] => 3 * ) * * [3] => Array * ( * [0] => baz * [1] => 6 * ) * * ) * ]]> * * * * * * * PREG_UNMATCHED_AS_NULL * * * If this flag is passed, unmatched subpatterns are reported as NULL; * otherwise they are reported as an empty string. * * * * ]]> * * The above example will output: * * * string(2) "ac" * [1]=> * string(1) "a" * [2]=> * string(0) "" * [3]=> * string(1) "c" * } * array(4) { * [0]=> * string(2) "ac" * [1]=> * string(1) "a" * [2]=> * NULL * [3]=> * string(1) "c" * } * ]]> * * * * * * * * If this flag is passed, for every occurring match the appendant string * offset (in bytes) will also be returned. Note that this changes the value of * matches into an array where every element is an * array consisting of the matched string at offset 0 * and its string offset into subject at offset * 1. * * * * ]]> * * The above example will output: * * Array * ( * [0] => foobarbaz * [1] => 0 * ) * * [1] => Array * ( * [0] => foo * [1] => 0 * ) * * [2] => Array * ( * [0] => bar * [1] => 3 * ) * * [3] => Array * ( * [0] => baz * [1] => 6 * ) * * ) * ]]> * * * * The above example will output: * * If this flag is passed, unmatched subpatterns are reported as NULL; * otherwise they are reported as an empty string. * * * * ]]> * * The above example will output: * * * string(2) "ac" * [1]=> * string(1) "a" * [2]=> * string(0) "" * [3]=> * string(1) "c" * } * array(4) { * [0]=> * string(2) "ac" * [1]=> * string(1) "a" * [2]=> * NULL * [3]=> * string(1) "c" * } * ]]> * * * * The above example will output: * @param int $offset If this flag is passed, for every occurring match the appendant string * offset (in bytes) will also be returned. Note that this changes the value of * matches into an array where every element is an * array consisting of the matched string at offset 0 * and its string offset into subject at offset * 1. * * * * ]]> * * The above example will output: * * Array * ( * [0] => foobarbaz * [1] => 0 * ) * * [1] => Array * ( * [0] => foo * [1] => 0 * ) * * [2] => Array * ( * [0] => bar * [1] => 3 * ) * * [3] => Array * ( * [0] => baz * [1] => 6 * ) * * ) * ]]> * * * * The above example will output: * @return 0|1 preg_match returns 1 if the pattern * matches given subject, 0 if it does not. * @throws PcreException * */ function preg_match(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): int { error_clear_last(); $safeResult = \preg_match($pattern, $subject, $matches, $flags, $offset); if ($safeResult === false) { throw PcreException::createFromPhpError(); } return $safeResult; } /** * The behavior of this function is similar to * preg_replace_callback, except that callbacks are * executed on a per-pattern basis. * * @param array $pattern An associative array mapping patterns (keys) to callables (values). * @param array|string $subject The string or an array with strings to search and replace. * @param int $limit The maximum possible replacements for each pattern in each * subject string. Defaults to * -1 (no limit). * @param int|null $count If specified, this variable will be filled with the number of * replacements done. * @param int $flags flags can be a combination of the * PREG_OFFSET_CAPTURE and * PREG_UNMATCHED_AS_NULL flags, which influence the * format of the matches array. * See the description in preg_match for more details. * @return array|string preg_replace_callback_array returns an array if the * subject parameter is an array, or a string * otherwise. On errors the return value is NULL * * If matches are found, the new subject will be returned, otherwise * subject will be returned unchanged. * @throws PcreException * */ function preg_replace_callback_array(array $pattern, $subject, int $limit = -1, ?int &$count = null, int $flags = 0) { error_clear_last(); $safeResult = \preg_replace_callback_array($pattern, $subject, $limit, $count, $flags); if ($safeResult === null) { throw PcreException::createFromPhpError(); } return $safeResult; } /** * The behavior of this function is almost identical to * preg_replace, except for the fact that instead of * replacement parameter, one should specify a * callback. * * @param array|string $pattern The pattern to search for. It can be either a string or an array with * strings. * @param callable(array):string $callback A callback that will be called and passed an array of matched elements * in the subject string. The callback should * return the replacement string. This is the callback signature: * * * stringhandler * arraymatches * * * You'll often need the callback function * for a preg_replace_callback in just one place. * In this case you can use an * anonymous function to * declare the callback within the call to * preg_replace_callback. By doing it this way * you have all information for the call in one place and do not * clutter the function namespace with a callback function's name * not used anywhere else. * * * preg_replace_callback and * anonymous function * * * ]]> * * * @param array|string $subject The string or an array with strings to search and replace. * @param int $limit The maximum possible replacements for each pattern in each * subject string. Defaults to * -1 (no limit). * @param int|null $count If specified, this variable will be filled with the number of * replacements done. * @param int $flags flags can be a combination of the * PREG_OFFSET_CAPTURE and * PREG_UNMATCHED_AS_NULL flags, which influence the * format of the matches array. * See the description in preg_match for more details. * @return array|string preg_replace_callback returns an array if the * subject parameter is an array, or a string * otherwise. On errors the return value is NULL * * If matches are found, the new subject will be returned, otherwise * subject will be returned unchanged. * @throws PcreException * */ function preg_replace_callback($pattern, callable $callback, $subject, int $limit = -1, ?int &$count = null, int $flags = 0) { error_clear_last(); $safeResult = \preg_replace_callback($pattern, $callback, $subject, $limit, $count, $flags); if ($safeResult === null) { throw PcreException::createFromPhpError(); } return $safeResult; } /** * Split the given string by a regular expression. * * @param string $pattern The pattern to search for, as a string. * @param string $subject The input string. * @param int|null $limit If specified, then only substrings up to limit * are returned with the rest of the string being placed in the last * substring. A limit of -1 or 0 means "no limit". * @param int $flags flags can be any combination of the following * flags (combined with the | bitwise operator): * * * PREG_SPLIT_NO_EMPTY * * * If this flag is set, only non-empty pieces will be returned by * preg_split. * * * * * PREG_SPLIT_DELIM_CAPTURE * * * If this flag is set, parenthesized expression in the delimiter pattern * will be captured and returned as well. * * * * * PREG_SPLIT_OFFSET_CAPTURE * * * If this flag is set, for every occurring match the appendant string * offset will also be returned. Note that this changes the return * value in an array where every element is an array consisting of the * matched string at offset 0 and its string offset * into subject at offset 1. * * * * * * If this flag is set, for every occurring match the appendant string * offset will also be returned. Note that this changes the return * value in an array where every element is an array consisting of the * matched string at offset 0 and its string offset * into subject at offset 1. * @return list Returns an array containing substrings of subject * split along boundaries matched by pattern. * @throws PcreException * */ function preg_split(string $pattern, string $subject, ?int $limit = -1, int $flags = 0): array { error_clear_last(); $safeResult = \preg_split($pattern, $subject, $limit, $flags); if ($safeResult === false) { throw PcreException::createFromPhpError(); } return $safeResult; }
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