preg_grep
(PHP 4, PHP 5, PHP 7, PHP 8)
preg_grep — Return array entries that match the pattern
Description
preg_grep(string
$pattern, array $array, int $flags = 0): array|false
Returns the array consisting of the elements of the
array array that match the given
pattern.
Parameters
-
pattern -
The pattern to search for, as a string.
-
array -
The input array.
-
flags -
If set to
PREG_GREP_INVERT, this function returns the elements of the input array that do not match the givenpattern.
Return Values
Returns an array indexed using the keys from the
array array, or false on failure.
Errors/Exceptions
If the regex pattern passed does not compile to a valid regex, an E_WARNING is emitted.
Examples
Example #1 preg_grep() example
<?php
// return all array elements
// containing floating point numbers
$fl_array = preg_grep("/^(\d+)?\.\d+$/", $array);
?>
See Also
- PCRE Patterns
- preg_quote() - Quote regular expression characters
- preg_match_all() - Perform a global regular expression match
- preg_filter() - Perform a regular expression search and replace
- preg_last_error() - Returns the error code of the last PCRE regex execution
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