Example #1 Examples of valid patterns
/<\/\w+>/|(\d{3})-\d+|Sm/^(?i)php[34]/{^\s+(\s+)?$}
Example #2 Examples of invalid patterns
/href="/?originalUrl=https%3A%2F%2Fwww.php.net%2F%26%23039%3B(.*)%26%23039%3B%253C%2Fcode"> - missing ending delimiter
/\w+\s*\w+/J - unknown modifier 'J'
1-\d3-\d3-\d4| - missing starting delimiter