What are the potential reasons for a syntax error when using PHP functions like preg_match or file_get_contents?

A potential reason for a syntax error when using PHP functions like preg_match or file_get_contents could be due to incorrect syntax in the function call or improper usage of parameters. To solve this issue, double-check the function call syntax, ensure that all required parameters are provided in the correct order, and validate inputs to prevent unexpected errors.

// Example of correct usage of preg_match
$pattern = '/[0-9]+/';
$string = 'abc123xyz';
if (preg_match($pattern, $string, $matches)) {
    echo 'Match found: ' . $matches[0];
} else {
    echo 'No match found.';
}

// Example of correct usage of file_get_contents
$url = 'https://www.example.com';
$content = file_get_contents($url);
echo $content;