Some common PHP simple command code collection _php Tips

Delete the construction:
Reference
if (file_exists ("file.htm"))//check for the existence of this file
if (file_exists ("chat"))//Check if this folder exists
Rename (' index.php ', ' Index '); Rename the index.php to index
fopen ("name.php", "A +"); Create a file
mkdir ("Boot", "0777"); Create a folder and set the property to 777
RmDir ("include");//Delete folder
Unlink ("index.php");//delete file

Query for database:
Reference
$db = new Db_query;
$db->connect ();
$db->query ("DROP DATABASE $DbName;"); /$dbname is the database name

Connection:
Reference
Header ("location:index.php");/Go to Web page
echo "Step two: Please choose whether to delete all files [chat room]<br>";/write code
Unset ($TMP); Clear the original cache
Require ("global.php");//cache
Print <<< EOT//write code
EoT