How to convert all strings to lowercase in php

php method to convert all strings to lowercase: first create a PHP sample file; then convert the string to lowercase through the strtolower function.

#The operating environment of this article: Windows7 system, PHP7.1, Dell G3 computer.

strtolower() function converts a string to lowercase.

Note: This function is binary safe.

Related functions:

lcfirst() - Convert the first character in the string to lowercase

strtoupper() - Convert the string to uppercase

ucfirst() - Converts the first character in the string to uppercase

ucwords() - Converts the first character of each word in the string to uppercase

Syntax

strtolower(string)

Parameters

string required. Specifies the string to be converted.

Example

Convert all characters to lowercase:

<?php
echo strtolower("Hello WORLD.");
?>

Output:

hello world.

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