How to replace the last character in a string in php

The way PHP replaces the last character in a string is through the preg_replace() function. The syntax of this function is: [preg_replace(mixed $pattern, mixed $replacement, mixed $subject].

To replace the last character in the string, This can be achieved through the preg_replace() function.

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Function introduction:

preg_replace function performs a regular expression search and replacement.

Syntax:

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

means to search for the part of the subject that matches pattern and replace it with replacement.

Parameters:

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

• $replacement: used for The string or string array to replace.

• $subject: The target string or string array to search for and replace.

• $limit : Optional, the maximum number of substitutions for each subject string per pattern. Default is -1 (unlimited).

• $count: Optional, for substitutions The number of executions.

Code implementation:

For example, we want to replace '1' with '0':

$image_path = 'http://www.php.cn/1';
$str = preg_replace('#.$#i', '0', $image_path);//第二个参数要替换的内容

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