Function set disabled after security mode is enabled in php

Copy codeThe Code is as follows:
<? Php
Ini_set ("safe_mode", true );
?>

Table 42-2. Security mode restriction Functions

Function Name	Restrictions
Dbmopen ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ).
Dbase_open ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ).
Filepro ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ).
Filepro_rowcount ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ).
Filepro_retrieve ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ).
Ifx _*	SQL _safe_mode limit ,(! = Safe mode)
Ingres _*	SQL _safe_mode limit ,(! = Safe mode)
Mysql _*	SQL _safe_mode limit ,(! = Safe mode)
Pg_loimport ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ).
Posix_mkfifo ()	Check whether the operated directory has the same UID (owner) as the script being executed ).
Putenv ()	Follow the safe_mode_protected_env_vars and safe_mode_allowed_env_vars options set by ini. SeePutenv ()Function documentation.
Move_uploaded_file ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ).
Chdir ()	Check whether the operated directory has the same UID (owner) as the script being executed ).
Dl ()	This function is disabled in safe mode.
Backtick operator	This function is disabled in safe mode.
Shell_exec ()(The function is the same as the backticks function)	This function is disabled in safe mode.
Exec ()	You can only perform operations in the directory set by safe_mode_exec_dir. For some reason, it cannot be used in the path of the executable object currently....Escapeshellcmd ()Will be applied to the parameters of this function.
System ()	You can only perform operations in the directory set by safe_mode_exec_dir. For some reason, it cannot be used in the path of the executable object currently....Escapeshellcmd ()Will be applied to the parameters of this function.
Passthru ()	You can only perform operations in the directory set by safe_mode_exec_dir. For some reason, it cannot be used in the path of the executable object currently....Escapeshellcmd ()Will be applied to the parameters of this function.
Popen ()	You can only perform operations in the directory set by safe_mode_exec_dir. For some reason, it cannot be used in the path of the executable object currently....Escapeshellcmd ()Will be applied to the parameters of this function.
Fopen ()	Check whether the operated directory has the same UID (owner) as the script being executed ).
Mkdir ()	Check whether the operated directory has the same UID (owner) as the script being executed ).
Rmdir ()	Check whether the operated directory has the same UID (owner) as the script being executed ).
Rename ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ). Check whether the operated directory has the same UID (owner) as the script being executed ).
Unlink ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ). Check whether the operated directory has the same UID (owner) as the script being executed ).
Copy ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ). Check whether the operated directory has the same UID (owner) as the script being executed ). (OnsourceAndtarget)
Chgrp ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ).
Chown ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ).
Chmod ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ). In addition, SUID, SGID, and sticky bits cannot be set.
Touch ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ). Check whether the operated directory has the same UID (owner) as the script being executed ).
Symlink ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ). Check whether the operated directory has the same UID (owner) as the script being executed ). (Note: Only test target)
Link ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ). Check whether the operated directory has the same UID (owner) as the script being executed ). (Note: Only test target)
Apache_request_headers ()	In security mode, headers starting with "authorization" (case sensitive) are not returned.
Header ()	In security mode, ifWWW-Authenticate, The uid of the current script will be added toRealm.
PHP_AUTH variable	In safe modePHP_AUTH_USER,PHP_AUTH_PWAndPHP_AUTH_TYPEIn$_SERVERIs unavailable. However, you can still useREMOTE_USERTo obtain the USER name ). (Note: it is valid only after PHP 4.3.0)
Highlight_file (),Show_source ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ). Check whether the operated directory has the same UID (owner) as the script being executed ). (Note: it is only valid after version 4.2.1)
Parse_ini_file ()	Check whether the operated file or directory has the same UID (owner) as the script being executed ). Check whether the operated directory has the same UID (owner) as the script being executed ). (Note: it is only valid after version 4.2.1)
Set_time_limit ()	It does not work in security mode.
Max_execution_time	It does not work in security mode.
Mail ()	In security mode, the fifth parameter is blocked. (Note: only affected since PHP 4.2.3)
Any usePhp4/main/fopen_wrappers.cFunctions	??