在php中返回垃圾（HTTP响应）时执行exec（'php -v'）时出错

Question

我有一个共享服务器Linux，基于此我正面临一个奇怪的问题。我试图通过PHP执行以下命令并且它运行正常;返回给我PHP安装路径/usr/bin/php。

exec('which php');// This runs so exec is not disabled 

但我尝试与exec('php ...');执行任何命令失败返回箱98到114元件中随机地几乎具有垃圾遍布的阵列。我跑的命令的例子是...

exec('php -v'); 
exec('php -i'); 
exec('/usr/bin/php -v'); 

以上都没有返回的东西明智。任何想法为什么任何命令运行的PHP不执行？

以下是exec()返回给我的数据数组的var_dump()。

EDIT（后一些更RND）

我能够执行

exec('php -h') 

和它reuturned我在可读的格式下面的数组。

string(9) "php -help" 
string(47) "Usage: php [-q] [-h] [-s] [-v] [-i] [-f ]" 
string(27) "  php [args...]" 
string(36) " -a    Run interactively" 
string(69) " -b | Bind Path for external FASTCGI Server mode" 
string(57) " -C    Do not chdir to the script's directory" 
string(58) " -c | Look for php.ini file in this directory" 
string(47) " -n    No php.ini file will be used" 
string(56) " -d foo[=bar]  Define INI entry foo with value 'bar'" 
string(70) " -e    Generate extended information for debugger/profiler" 
string(46) " -f   Parse . Implies `-q'" 
string(28) " -h    This help" 
string(34) " -i    PHP information" 
string(43) " -l    Syntax check only (lint)" 
string(43) " -m    Show compiled in modules" 
string(60) " -q    Quiet-mode. Suppress HTTP Header output." 
string(60) " -s    Display colour syntax highlighted source." 
string(33) " -v    Version number" 
string(72) " -w    Display source with stripped comments and whitespace." 
string(46) " -z   Load Zend extension ." 
string(75) " -T  Measure execution time of script repeated times." 
This page was created in 0.055487155914307 seconds 

哦，顺便说一句，我使用测试脚本如下...

<?php 
$mtime = microtime(); 
$mtime = explode(" ",$mtime); 
$mtime = $mtime[1] + $mtime[0]; 
$starttime = $mtime; 


if(!empty($_GET['p']) && $_GET['p'] == true){ 

    //$command = 'php -help'; //this works 
    //$command = 'cat ' . getcwd() . '/dummy1.txt'; //this works echo's a simple text file 

    //$command = 'php -q ' . getcwd() . '/dummy1.txt'; //NOT WORKING 
    $command = 'php -m'; //NOT WORKING 

    echo '<div><pre>'; 
    var_dump($command); 
    echo '</pre></div>'; 

    exec($command, $output, $return); 
    //passthru($command,$output); 

    echo '<div><pre>'; 
    foreach($output as $key => $value){ 
     var_dump($output[$key]); 
    } 
    echo '</pre></div>'; 
} 


$mtime = microtime(); 
$mtime = explode(" ",$mtime); 
$mtime = $mtime[1] + $mtime[0]; 
$endtime = $mtime; 
$totaltime = ($endtime - $starttime); 
echo "This page was created in ".$totaltime." seconds"; 
?> 

Pastebin.org Link

Answer 1

它的PHP CGI从环境中读取脚本名称，从而导致调用脚本运行多次或有时无限次。

解决方案是简单地使用命令php-cli而不是命令php。

替换了行$command = 'php -m';与$command = 'php-cli -m';对你的代码，一切都会正常工作。

Answer 2

鉴于该数据似乎是一个HTTP响应，你有Content-Encoding: gzip那里，我会使用gzdecode()字符串来解码“垃圾”。