What are the differences in PHP behavior between versions 4.3.4 and 4.3.6 that may affect the functionality of code snippets like the one shared in the forum?

In PHP versions 4.3.4 and 4.3.6, there were some changes in how the `mysql_real_escape_string` function handles special characters. This may affect the functionality of code snippets that rely on proper escaping of input data to prevent SQL injection attacks. To solve this issue, it is recommended to use `mysqli_real_escape_string` instead, which provides better security and compatibility with newer PHP versions. 

// Original code using mysql_real_escape_string
$unsafe_variable = $_POST['input'];
$safe_variable = mysql_real_escape_string($unsafe_variable);

// Updated code using mysqli_real_escape_string
$unsafe_variable = $_POST['input'];
$conn = mysqli_connect("localhost", "username", "password", "database");
$safe_variable = mysqli_real_escape_string($conn, $unsafe_variable);

Keywords

PHP version 4.3.4 version 4.3.6 code snippets functionality

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