PHP

str_includes php

<?php
$string = 'The lazy fox jumped over the fence';

if (str_contains($string, '')) {
    echo "Checking the existence of an empty string will always return true";
}

if (str_contains($string, 'lazy')) {
    echo "The string 'lazy' was found in the string
";
}

if (str_contains($string, 'Lazy')) {
    echo 'The string "Lazy" was found in the string';
} else {
    echo '"Lazy" was not found because the case does not match';
}

# Checking the existence of the empty string will always return true
# The string 'lazy' was found in the string
# "Lazy" was not found because the case does not match

contains php

if (strpos($a, 'are') !== false) {
    echo 'true';
}

php contain

string = 'The lazy fox jumped over the fence';

if (str_contains($string, 'lazy')) {
    echo "The string 'lazy' was found in the string
";
}

str_contains php 5

// For php < 8
/**
 * Determine if a string contains a given substring.
 *
 * @param  string  $haystack
 * @param  string  $needle
 * @return bool
 */
function str_contains($haystack, $needle)
{
	return $needle !== '' && self::strpos($haystack, $needle) !== false; 
}