What function can be used to test characters in a string in PHP?

To test characters in a string in PHP, you can use the `strpos()` function. This function allows you to check if a specific character or substring exists within a given string. If the character is found, `strpos()` will return the position of the character in the string, otherwise it will return false. 

$string = "Hello World";
$character = "o";

if (strpos($string, $character) !== false) {
    echo "The character '$character' was found in the string.";
} else {
    echo "The character '$character' was not found in the string.";
}

Keywords

PHP function test characters string

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