Execute command via shell and return the complete output as a string

# shell_exec

(PHP 4, PHP 5, PHP 7)

shell_exec — Execute command via shell and return the complete output as a string

### Descrierea

shell_exec ( string `$cmd` ) : string

This function is identical to the backtick operator.

### Parametri

`cmd`

  The command that will be executed.

### Valorile întoarse

The output from the executed command or `NULL` if an error occurred or the command produces no output.

> Notă:

> This function can return `NULL` both when an error occurs or the program produces no output. It is not possible to detect execution failures using this function. exec() should be used when access to the program exit code is required.

### Exemple

Example #1 A shell_exec() example

`<?php
$output = shell_exec('ls -lart');
echo "<pre>$output</pre>";
?>`

### Note

> Notă:

> Această funcție este dezactivată atunci când PHP rulează în modul securizat.

### A se vedea și

- exec() - Execute an external program
- escapeshellcmd() - Escape shell metacharacters