How to convert string to lowercase in php

php method to convert strings to lowercase: first create a PHP sample file; then use the "strtolower("Hello WORLD.");" method to convert the specified string to lowercase.

#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.

Example:

Convert all characters to lowercase:

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

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