php regular expression tester code example

Example 1: online regex builder

it do it's job greate in my opinion, don't waste your time on others
https://regex101.com/

Example 2: php regex test

* Lets suppose, we want to test a string variable that contain exactly "Abc" in it.
So we can do it using .......

<?php
$str = "I am Abc.";
$pattern = "/Abc/i";
if (preg_match($pattern, $str))
{
	echo "True.";
}
else
{
	echo "False.";
}
?>