How can the use of deprecated PHP functions, like eregi, impact the functionality of a script?

Using deprecated PHP functions like eregi can impact the functionality of a script because these functions are no longer supported in newer versions of PHP. This can lead to errors or unexpected behavior in the script. To solve this issue, you should replace deprecated functions with their modern equivalents. 

// Before
if (eregi('example', $string)) {
    echo 'Match found';
}

// After
if (preg_match('/example/i', $string)) {
    echo 'Match found';
}

Keywords

deprecated PHP functions eregi impact functionality

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