How to replace the first character in a string in php

In PHP, you can use the substr_replace() function to replace the first character in a string, the syntax format is "substr_replace(original string, "replacement character",0,1)"; substr_replace() function You can replace part of a string with another string.

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

php replaces the first string in the string characters

<?php
$str1="abcdefg";
$str2=substr_replace($str1,"A",0,1);
echo $str2;
?>

Output:

Abcdefg

Related function description:

substr_replace() function replaces part of the string for another string.

Syntax:

substr_replace(string,replacement,start,length)

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

Recommended learning: "PHP Video Tutorial"

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