It is impossible for you to escape each of these special characters, especially if you are dealing with the content automatically submitted by the form.
So, you should use the Mysql_real_escape_string function:
Mysql_real_escape_string-the special characters in the string used in the escape SQL statement, taking into account the current character set of the connection.
But note: This function does not escape% and _. In addition, it is best not to use the function for the entire SQL statement, but to only escape the string parameters of the incoming SQL statement, otherwise unexpected results will occur.
Examples of scripts:
Copy Code code as follows:
<?php
$item = "Zak ' s and Derick ' s laptop";
$escaped _item = mysql_real_escape_string ($item);
printf ("Escaped string:%s\n", $escaped _item);
?>
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