Why does preg_match() allow backticks in this scenario and how can it be fixed?

The issue is that the preg_match() function allows backticks because they are not escaped in the regular expression pattern. To fix this, you can escape the backtick character in the regular expression pattern using a backslash (\`). 

$pattern = '/`/';
$string = 'This is a `backtick`';
if (preg_match($pattern, $string)) {
    echo 'Backtick found!';
} else {
    echo 'Backtick not found!';
}

Keywords

preg_match backticks regex escaping fix

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