What are modifiers and delimiters in PHP's preg_match function?

Modifiers in PHP's preg_match function are additional flags that can be added to the regular expression pattern to change its behavior. Delimiters, on the other hand, are characters that mark the start and end of the regular expression pattern. It is important to use the correct modifiers and delimiters when using preg_match to ensure the pattern is interpreted correctly. 

// Example of using preg_match with modifiers and delimiters
$string = "Hello, World!";
$pattern = "/hello/i"; // Using 'i' modifier for case-insensitive matching
if (preg_match($pattern, $string)) {
    echo "Match found!";
} else {
    echo "No match found.";
}

Keywords

PHP preg_match modifiers delimiters regular expressions

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