What are the potential pitfalls of using the eregi() function in PHP?

The eregi() function in PHP is deprecated as of PHP 5.3.0 and removed in PHP 7. Use of this function can lead to security vulnerabilities and compatibility issues with newer versions of PHP. To fix this issue, it is recommended to use the preg_match() function with the 'i' modifier for case-insensitive matching. 

// Using preg_match() with 'i' modifier for case-insensitive matching
if (preg_match('/pattern/i', $string)) {
    // do something
}

Keywords

eregi PHP regular expressions deprecated case-insensitive

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