How to check if a string contains a specific text [duplicate]

Question

<?php $a = '';  if($a exist 'some text')     echo 'text'; ?> 

Suppose I have the code above, how to write the statement "if($a exist 'some text')"?

Answer 1

Use the strpos function: http://php.net/manual/en/function.strpos.php

$haystack = "foo bar baz"; $needle   = "bar";  if( strpos( $haystack, $needle ) !== false) {     echo "\"bar\" exists in the haystack variable"; } 

In your case:

if( strpos( $a, 'some text' ) !== false ) echo 'text'; 

Note that my use of the !== operator (instead of != false or == true or even just if( strpos( ... ) ) {) is because of the "truthy"/"falsy" nature of PHP's handling of the return value of strpos.

As of PHP 8.0.0 you can now use str_contains

<?php     if (str_contains('abc', '')) {         echo "Checking the existence of the empty string will always          return true";     } 

Answer 2

Empty strings are falsey, so you can just write:

if ($a) {     echo 'text'; } 

Although if you're asking if a particular substring exists in that string, you can use strpos() to do that:

if (strpos($a, 'some text') !== false) {     echo 'text'; }