In this article, you will learn how to find and replace string in PHP. The preg_replace() function in PHP returns a string or array of strings where all matches of a pattern or list of patterns found in the input are replaced with substrings.
what is the syntax of the PREG_REPLACE function in php?
preg_replace(patterns, replacements, input, limit, count)| Parameter | Description |
|---|---|
| patterns | Required. Contains a regular expression or array of regular expressions |
| replacements | Required. A replacement string or an array of replacement strings |
| input | Required. The string or array of strings in which replacements are being performed |
| limit | Optional. Defaults to -1, meaning unlimited. Sets a limit to how many replacements can be done in each string |
| count | Optional. After the function has executed, this variable will contain a number indicating how many replacements were performed |
examples of the PREG_REPLACE function
Example 1. In this example, we use a case-insensitive regular expression to replace Microsoft with W3Schools in a string.
<?php
$str = 'Visit Microsoft!';
$pattern = '/microsoft/i';
echo preg_replace($pattern, 'W3Schools', $str);
?>
