PHP | is_executable( )

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