Bug #77645 [NEW]: Error in the exec function

From: Date: Thu, 21 Feb 2019 09:40:44 +0000
Subject: Bug #77645 [NEW]: Error in the exec function
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-219670@lists.php.net to get a copy of this message
From:             ailiangkuai at qq dot com
Operating system: CentOS release 6.8 (Final)
PHP version:      7.1.26
Package:          Unknown/Other Function
Bug Type:         Bug
Bug description:Error in the exec function

Description:
------------
---
From manual page: https://php.net/function.system
---
i want execute linux shell via php.if the shell works fine,the $output
will be filled with every line of output from the shell script.but if
shell script has error,$output is filled whith nothing. i have used the
func of python which is commands.getoutput,Get the result regardless of
whether the script has an error.

Test script:
---------------
<?php
$lastOutput = exec("gunzip < /backup-files/test.sql.gz | mysql -u***
-p'***' --host=localhost --database=test",$output,$return_var);


-- 
Edit bug report at https://bugs.php.net/bug.php?id=77645&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=77645&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=77645&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=77645&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=77645&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=77645&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=77645&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=77645&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=77645&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=77645&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=77645&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=77645&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=77645&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=77645&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77645&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=77645&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=77645&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=77645&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=77645&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=77645&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=77645&r=mysqlcfg



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