What best practices should be followed when using preg_match() and preg_match_all() functions in PHP for pattern matching?

When using preg_match() and preg_match_all() functions in PHP for pattern matching, it is important to follow best practices to ensure efficient and accurate results. Some best practices include properly escaping special characters in the regex pattern, using the correct flags for case sensitivity and multiline matching, and handling errors or exceptions gracefully. 

// Example of using preg_match() with best practices
$string = "Hello, World!";
$pattern = "/hello/i"; // Case-insensitive matching
if (preg_match($pattern, $string, $matches)) {
    echo "Match found: " . $matches[0];
} else {
    echo "No match found";
}

Keywords

PHP preg_match preg_match_all pattern matching regular expressions

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