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# preg_grep

preg_grep -- Return array entries that match the pattern

## Description

`array preg_grep`(string pattern, array input);

preg_grep() returns the array consisting of the elements of the `input` array that match the given `pattern`.

Example 1. preg_grep() example

      1
      2 preg_grep("/^(\d+)?\.\d+$/", $array); // find all floating point numbers in the array
      3

> Note: This function was added in PHP 4.0.

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