is_executable

(PHP 4, PHP 5, PHP 7)

is_executableTells whether the filename is executable

Опис

bool is_executable ( string $filename )

Tells whether the filename is executable.

Параметри

filename

Path to the file.

Значення, що повертаються

Returns TRUE if the filename exists and is executable, or FALSE on error.

Приклади

Приклад #1 is_executable() example

<?php

$file 
'/home/vincent/somefile.sh';

if (
is_executable($file)) {
    echo 
$file.' is executable';
} else {
    echo 
$file.' is not executable';
}

?>

Помилки/Винятки

При збоях, буде видаватись E_WARNING.

Примітки

Зауваження: Рузультати цієї функції кешуються. Прогляньте clearstatcache() для більш детальної інформації.

Підказка

As of PHP 5.0.0, this function can also be used with some URL wrappers. Refer to Supported Protocols and Wrappers to determine which wrappers support stat() family of functionality.

Прогляньте Також

  • is_file() - Tells whether the filename is a regular file
  • is_link() - Tells whether the filename is a symbolic link

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User Contributed Notes 5 notes

up
12
Shyammakwana.me
6 years ago
For windows users,

It will return TRUE for EXE extensions. I have checked for MSI, but it returns FALSE.
up
2
nick at NOSPAM dot ogredata dot com
2 years ago
This function returns the value for the process PHP is executing under.

/var/somebody/files was only executable by owner (700).

It contained world-readable files, but without execute permission, PHP could not access the directory to download the files.

is_executable() returned false.

Making the dir world-executable (701) gave access to PHP.  The download worked. And is_executable() returned true.

I assume that if I added PHP to the group of the folder and gave the group executable permission, that would also work.
up
1
Anonymous
2 years ago
Under windows, it seems to returns always false for directories.

I.e

<?php
$dir
= __DIR__;
$result = is_executable($dir) ? 'true' : 'false';

if(
$result){
  echo
$result;
}
?>

So do NOT use this to check if a folder is transversable because it will be system dependant code.
up
1
divinity76 at gmail dot com
3 years ago
is_executable() does not check the PATH environment variable, so if your current working dir is /dir/ and you have /bin/ in your PATH env and the file /bin/ffmpeg exists, then you can still run shell_exec("ffmpeg"), but is_executable("ffmpeg") will return false.

if you're looking for a version of is_executable that also considers the PATH environment variable, then try this:

<?php

function is_executable_pathenv(string $filename): bool
{
    if (
is_executable($filename)) {
        return
true;
    }
    if (
$filename !== basename($filename)) {
        return
false;
    }
   
$paths = explode(PATH_SEPARATOR, getenv("PATH"));
    foreach (
$paths as $path) {
        if (
is_executable($path . DIRECTORY_SEPARATOR . $filename)) {
            return
true;
        }
    }
    return
false;
}
up
-1
telezhkin at gmail dot com
3 years ago
Find no mention of this, but is_executable returns result for owner permissions only (not for group or other).
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