The is_executable() function in PHP is an inbuilt function which is used to check whether the specified file is an executable file or not. The name of the file is sent as a parameter to the is_executable() function and it returns True if the file is an executable file else it returns False.
Syntax:
bool is_executable($file)
Parameters Used:
The is_executable() function in PHP accepts one parameter.
- $file: It is a mandatory parameter which specifies the file.
Return Value:
It returns True if the file is an executable file else it returns false.
Exceptions
- An E_WARNING is emitted on failure.
- The result of this function are cached and therefore the clearstatcache() function is used to clear the cache.
- is_executable() function returns false for non-existent files.
Below programs illustrate the is_executable() function.
Program 1:
<?php $myfile = "gfg.exe";   // checking whether the file is // an executable file or not if (is_executable($myfile))     echo ("$myfile: executable!"); else    echo ("$myfile: not executable!");   ?> |
Output:
gfg.exe is executable!
Program 2
<?php // fileperms() function returns the // permission as a number on success // or FALSE on failure $permissions = fileperms("gfg.exe");    $permvalue = sprintf("%o", $permissions);    // checking whether the file is executable // or not if (is_executable("gfg.exe"))     echo ("Executable file and File "         "Permissions are : $permvalue"); else    echo ("Not Executable file and File "          "Permissions are : $permvalue");   ?> |
Output:
Executable file and File Permissions are : 0644
Reference:
http://php.net/manual/en/function.is-executable.php
