Why Does mysqli_real_escape_string() Throw a 'expects exactly 2 parameters, 1 given' Error?

Understanding the mysqli_real_escape_string Error Message

When attempting to use mysqli_real_escape_string(), developers may encounter the error "mysqli_real_escape_string() expects exactly 2 parameters, 1 given." This error stems from misunderstandings surrounding the function's parameter requirements.

Function Definition

mysqli_real_escape_string() requires two parameters:

1. $link: A link identifier for an open MySQL connection.
2. $escapestr: The string to be escaped.

Troubleshooting the Error

To resolve the error, ensure you provide both parameters correctly. Here's a corrected code snippet:

if (phpversion() >= '4.3.0') {
    $string = mysqli_real_escape_string($link, $string);
} else {
    $string = mysqli_escape_string($string);
}

In this code, $link represents the MySQL connection link, and $string is the string to be escaped.

The error commonly occurs when you fail to provide the connection link. Remember, mysqli_real_escape_string() operates on an established database connection.

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