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What is the use of the preg_filter () function in PHP

2025-03-30 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >

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This article mainly introduces what is the use of the preg_filter() function in PHP, which has certain reference value. Interested friends can refer to it. I hope that after reading this article, you will gain a lot. Let Xiaobian take you to understand it together.

preg_filter() function

The preg_filter function is used to perform a regular expression search and replace. preg_filter() is equivalent to preg_replace(), but it only returns results that match the target.

syntax

mixed preg_filter ( mixed $pattern , mixed $replacement , mixed $subject [, int $limit = -1 [, int &$count ]] )

parameter description

$pattern: The pattern to search for. It can be a string or an array of strings.

$replacement: String or array of strings used for replacement.

$subject: String or array of strings to search and replace.

$limit: Optional, maximum number of substitutions per pattern per subject. The default is-1(infinite).

$count: optional, number of substitutions completed.

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