PHP Prevent SQL injection Code _php tutorial

PHP tutorials Prevent SQL injection code

*/

function Inject_check ($sql _str) {//Prevent injection
$check = eregi (' select|insert|update|delete| ' | /*|*|.. /|. /|union|into|load_file|outfile ', $sql _str);
if ($check) {
echo "Input illegal injection content! ";
Exit ();
} else {
return $sql _str;
}
}
function Checkurl () {//Check the antecedents
if (preg_replace ("/https tutorial?:/ /([^:/]+). */i "," 1 ", $_server[' Http_referer '])!== preg_replace ("/([^:]+). */"," 1 ", $_server[' Http_host ']) {
Header ("location:http://www.zhutiai.com");
Exit ();
}
}

Call
Checkurl ();
$str = $_get[' url '];
Inject_check ($sql _str);//This can be done when the parameter is obtained

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