What potential issues can arise when using both eregi and mysql_num_rows functions in PHP scripts?

Using both eregi and mysql_num_rows functions in PHP scripts can lead to compatibility issues as eregi is a deprecated function in PHP 5.3 and removed in PHP 7. To solve this problem, you should replace eregi with the preg_match function which provides similar functionality but is not deprecated. This will ensure that your script remains compatible with newer versions of PHP. 

// Replace eregi with preg_match to avoid compatibility issues
if (preg_match("/pattern/", $string)) {
    // Perform actions based on the match
}

// Example usage with preg_match and mysql_num_rows
$query = "SELECT * FROM table WHERE column = 'value'";
$result = mysql_query($query);
if (mysql_num_rows($result) > 0) {
    while ($row = mysql_fetch_assoc($result)) {
        // Process each row
    }
}

Keywords

eregi mysql_num_rows PHP scripts compatibility deprecation

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