exec in php - w3schools - Brave Search

PHP shell_exec() vs exec()

stackoverflow.com › questions › 7093860 › php-shell-exec-vs-exec

shell_exec returns all of the output stream as a string. exec returns the last line of the output by default, but can provide all output as an array specifed as the second parameter.

See

http://php.net/manual/en/function.shell-exec.php
http://php.net/manual/en/function.exec.php

Answer from Daniel A. White on Stack Overflow

php.net › manual › en › function.exec.php

PHP: exec - Manual

The command that will be executed. ... If the output argument is present, then the specified array will be filled with every line of output from the command. Trailing whitespace, such as \n, is not included in this array.

w3schools.com › php › func_ftp_exec.asp

PHP ftp_exec() Function

The ftp_exec() function requests for execution of a command on the FTP server. ... If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail: sales@w3schools.com · If you want to report an error, ...

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stackoverflow.com › questions › 7093860 › php-shell-exec-vs-exec

shell - PHP shell_exec() vs exec() - Stack Overflow

shell_exec returns all of the output stream as a string. exec returns the last line of the output by default, but can provide all output as an array specifed as the second parameter.

See

http://php.net/manual/en/function.shell-exec.php
http://php.net/manual/en/function.exec.php

Here are the differences. Note the newlines at the end.

> shell_exec('date')
string(29) "Wed Mar  6 14:18:08 PST 2013\n"
> exec('date')
string(28) "Wed Mar  6 14:18:12 PST 2013"

> shell_exec('whoami')
string(9) "mark\n"
> exec('whoami')
string(8) "mark"

> shell_exec('ifconfig')
string(1244) "eth0      Link encap:Ethernet  HWaddr 10:bf:44:44:22:33  \n          inet addr:192.168.0.90  Bcast:192.168.0.255  Mask:255.255.255.0\n          inet6 addr: fe80::12bf:ffff:eeee:2222/64 Scope:Link\n          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1\n          RX packets:16264200 errors:0 dropped:1 overruns:0 frame:0\n          TX packets:7205647 errors:0 dropped:0 overruns:0 carrier:0\n          collisions:0 txqueuelen:1000 \n          RX bytes:13151177627 (13.1 GB)  TX bytes:2779457335 (2.7 GB)\n"...
> exec('ifconfig')
string(0) ""

Note that use of the backtick operator is identical to shell_exec().

Update: I really should explain that last one. Looking at this answer years later even I don't know why that came out blank! Daniel explains it above -- it's because exec only returns the last line, and ifconfig's last line happens to be blank.

w3schools.invisionzone.com › server scripting › php

php exec() function doesn't work. - PHP - W3Schools Forum

May 29, 2008 - I'm unable to get exec() to work anymore, i've recently installed wamp and ever since it hasn't worked... I get no errors or anything... I'm kind of nubbish so I don't understand the ins and outs of the configs and stuff, i just need to know what needs to be activated or not and i hear all the cr...

geeksforgeeks.org › php › php-shell_exec-vs-exec-function

PHP shell_exec() vs exec() Function - GeeksforGeeks

July 11, 2025 - The shell_exec() function in PHP executes a command via the shell and returns the complete output as a string.

Hacking with PHP

hackingwithphp.com › 4 › 12 › 0 › executing-external-programs

Executing external programs: exec(), passthru(), and virtual() – Hacking with PHP - Practical PHP

If you pass a second and third parameter to exec(), the output of the command will be put into parameter two as an array with one line per element, and the return value of the command will be put into parameter three. Similarly, if you pass a second parameter to passthru() it will be filled with the return value of the command. ... <?php exec("dir", $output, $return); echo "Dir returned $return, and output:\n"; var_dump($output); ?>

w3docs.com › php

PHP exec() vs system() vs passthru()

passthru() executes the command and prints the raw output directly to the output buffer. It returns the exit status of the command as an integer, or FALSE on error. It's important to note that all of these functions can be vulnerable to command injection attacks if not used carefully. Here's an example of how these functions might be used: <?php $output = exec('ls -l'); echo $output; system('ls -l'); passthru('ls -l');

youtube.com › gautam ghosh

How to write and execute PHP - w3schools - YouTube

In this video tutorial you will learn how to write and execute PHP script. Its is a very basic tutorial for PHP beginner, and is associated with the website ...

Published February 15, 2014

Views 6K

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copyprogramming.com › howto › php-exec-function-in-php-code-example

Php: Example of Using the Php exec Function in PHP Code

July 8, 2023 - PHP ftp_exec() Function, W3Schools offers free online tutorials, references and exercises in all the major languages of the web.

w3schools.com › php › php_examples.asp

Write text to the output using PHP Keywords, classes, functions, and user-defined functions ARE NOT case-sensitive Variable names ARE case-sensitive ... Single-line comment before code line Single-line comment at the end of code line Use comment to prevent code from being executed Multi-line comment Multi-line comment to ignore code ... Create variables Output some text and the value of a variable Output the sum of two variables Assign the same value to multiple variables in one line Use var_dump() to return the data type of variables Global scope (variable outside function) Local scope (variable inside function) Static scope (let a local variable not be deleted after execution of function) Use the global keyword to access a global variable from within a function Use the $GLOBALS[] array to access a global variable from within a function

w3schools.sinsixx.com › jsref › jsref_exec_regexp.asp.htm

JavaScript exec() Method - SinSiXX - W3Schools

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Eli the Computer Guy

elithecomputerguy.com › 2020 › 04 › php-send-shell-commands-with-shell_exec

PHP – Send Shell Commands with shell_exec() – Eli the Computer Guy

April 14, 2020 - <input type="text" name="command"> <input type="submit"> </form> <?php $command = $_POST['command']; echo "<pre>"; echo shell_exec($command); echo "</pre>"; ?>

w3schools.com › php › func_filesystem_is_executable.asp

PHP is_executable() Function

is_executable(file) ❮ PHP Filesystem Reference · ★ +1 · Sign in to track progress · REMOVE ADS · PLUS · SPACES · GET CERTIFIED · FOR TEACHERS · BOOTCAMPS · CONTACT US · × · If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail: sales@w3schools.com ·

w3schools.com › php › func_misc_exit.asp

PHP exit() Function

Loops While Loop Do While Loop For Loop Foreach Loop Break Statement Continue Statement PHP Functions PHP Arrays · Arrays Indexed Arrays Associative Arrays Create Arrays Access Array Items Update Array Items Add Array Items Remove Array Items Sorting Arrays Multidimensional Arrays Array Functions PHP Superglobals

w3schools.invisionzone.com › server scripting › php

exec remote command and store output in a variable - PHP - W3Schools Forum

September 7, 2012 - So i am building an admin page as part of a project for the course I am doing. I want to execute the remote command "top" (it doesn't matter if i execute it by php ssh connection) on linux and than I want to store the output of the command in a variable called $data. Is that possible? I tried doi...

linuxhint.com › execute_shell_command_php

Execute Shell Command in PHP using exec() – Linux Hint

How this function can be used in PHP are shown in this tutorial. string exec ( string $command [, array &$output [, int &$return_var ]] )

oreilly.com › library › view › php-in-a › 0596100671 › re48.html

exec() - PHP in a Nutshell [Book]

October 13, 2005 - If you pass a second and third parameter to exec(), the output of the command will be put into parameter two as an array with one line per element, and the numeric exit status of the command will be put into parameter three. Similarly, if you pass a second parameter to passthru(), it will be filled with the return value of the command. ... That example should work fine on Windows, as well as on many versions of Unix. PHP's exec() is more like the Perl execution operator ('...') than the Perl exec() function.

Author Paul Hudson

Published 2005

Pages 372

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Exec in php w3schools Jobs, Employment | Freelancer

Ideal Skills: - Proficient in PHP, front-end technologies (HTML, CSS, JavaScript), and database management systems. - Experience in full-stack web development. - Ability to identify... ... ...reason i just can't seem to get this right. I am a senior exec and don't have time to spend hundreds of hours trying to figure it out.