PHP string "contains"

To check if a string contains another string in PHP, you can use the strpos() function. This function returns the position of the first occurrence of a substring within a string, or FALSE if the substring is not found. (Note: In PHP 8.0+, the recommended approach is the built-in str_contains() function, which returns a boolean directly.)

Here's an example of how you can use strpos() to check if a string contains another string:

How to check if a string contains another string in PHP?

This will output The string contains the word fox. If you want to check if the string contains a case-insensitive version of the substring, you can use the stripos() function instead of strpos():

This will also output The string contains the word fox.

How to check if a string contains another string in PHP by using strstr() function?

This will also output The string contains the word fox. Note that strstr() is generally slower than strpos() because it returns the entire remaining string rather than just a position. For modern PHP (8.0+), str_contains($string, 'fox') is the recommended, most readable approach.