How to Check if a String contains given Substring in PHP - Step by Step Examples

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How to Check if a String contains given Substring in PHP ?

Answer

To check if a string contains a given substring in PHP, you can use the 'strpos' function.

✐ Examples

1 Check if a String contains given Substring using 'strpos' function

In this example,

We create a function 'containsSubstring' that takes a string and a substring as input.
We use the 'strpos' function to check if the substring is present in the string.
If the substring is found, the position where it starts is returned; otherwise, 'false'.
Finally, we check the result and print if the substring is found or not.

PHP Program

<?php
function containsSubstring($str, $substr) {
    return strpos($str, $substr) !== false;
}

$str = "Hello World";
$substr = "World";
$contains = containsSubstring($str, $substr);
if ($contains) {
    echo "String contains substring '$substr'";
} else {
    echo "String does not contain substring '$substr'";
}
?>

Output

String contains substring 'World'

Summary

In this tutorial, we learned How to Check if a String contains given Substring in PHP language with well detailed examples.