What potential pitfalls should be considered when using eregi() function in PHP to validate variable content?

Using the eregi() function in PHP to validate variable content can pose potential security risks as it is case-insensitive and may not provide accurate validation. It is recommended to use the preg_match() function with appropriate regular expressions for more precise and secure validation of variable content. 

// Using preg_match() function with appropriate regular expressions for secure validation
$pattern = '/^[a-zA-Z0-9_\-\.]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$/';
$email = "example@example.com";

if(preg_match($pattern, $email)){
    echo "Valid email address";
} else {
    echo "Invalid email address";
}

Keywords

eregi PHP variable content validation pitfalls

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