How to replace the third character of a string in php

In PHP, you can use the substr_replace() function to replace the third character of the specified string. This function can start from the specified position in the string and replace the characters of the specified length; the syntax is "substr_replace(string , "replacement value", 2,1)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, you can use substr_replace () function to replace the third character of the specified string.

Example:

<?php
$str = &#39;12345678&#39;;
$replace = &#39;h&#39;;
echo substr_replace($str, $replace, 2,1);
?>

Description:

substr_replace() function replaces characters Replace part of a string with another string.

The substr_replace() function can replace characters of the specified length starting from the specified position in the string.

Syntax:

substr_replace(string,replacement,start,length)

Parameters	Description
string	Required. Specifies the string to check.
replacement	Required. Specifies the string to be inserted.
start	Required. Specifies where in the string to begin replacement. Positive number - starts at the specified position in the string Negative number - starts at the specified position from the end of the string 0 - at the first character in the string Start at
length	Optional. Specifies how many characters to replace. The default is the same as the string length. Positive number - the length of the string to be replaced Negative number - the number of characters to be replaced from the end of the string 0 - insert instead of replace

Return value: Returns the replaced string. If string is an array, the array is returned.

Recommended learning: "PHP Video Tutorial"

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