如何在PHP中将DUMP API请求信息发送到TXT文件？

I am working on API for DHRU CMS.

Unfortunately there are NO API setting to modify API CALLs, I can only provide domain: www.mydomain.com and Press SYNC. Then it will make a call to www.mydomain.com/api/index.php

Content of /api/index.php below:

   <?php
    if(!extension_loaded('ionCube Loader')){$__oc=strtolower(substr(php_uname(),0,3));
    $__ln='ioncube_loader_'.$__oc.'_'.substr(phpversion(),0,3).(($__oc=='win')?'.dll':'.so');
    if(function_exists('dl')){@dl($__ln);}if(function_exists('_il_exec')){return _il_exec();
    }
    $__ln='/ioncube/'.$__ln;
    $__oid=$__id=realpath(ini_get('extension_dir'));
    $__here=dirname(__FILE__);if(strlen($__id)>1&&$__id[1]==':'){$__id=str_replace('\\','/',substr($__id,2));
    $__here=str_replace('\\','/',substr($__here,2));
    }$__rd=str_repeat('/..',substr_count($__id,'/')).$__here.'/';
    $__i=strlen($__rd);
    while($__i--){if($__rd[$__i]=='/'){$__lp=substr($__rd,0,$__i).$__ln;if(file_exists($__oid.$__lp)){$__ln=$__lp;
    break;
    }}}if(function_exists('dl')){@dl($__ln);
    }}else{die('The file '.__FILE__." is corrupted.
");
    }if(function_exists('_il_exec')){return _il_exec();
    }echo('Site error: the file <b>'.__FILE__.'</b> requires the ionCube PHP Loader '.basename($__ln).' to be installed by the website operator. If you are the website operator please use the <a href="http://www.ioncube.com/lw/">ionCube Loader Wizard</a> to assist with installation.');
    exit(199);
    ?>
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I cant figure out what this contents means, but but the contents above is answer to API call. Now I am trying to figure out what it is asking for and how to reply. Here I have made a simple script to read values and dump them to TXT file. But file is empty.. No result so far with this code:

<?php
$myfile = fopen("newfile.txt", "w") or die("Unable to open file!");
$text = var_dump($__oc);
fwrite($myfile, $text);
$text = var_dump($__ln);
fwrite($myfile, $text);
$text = var_dump($__oid);
fwrite($myfile, $text);
$text = var_dump($__id);
fwrite($myfile, $text);
$text = var_dump($__here);
fwrite($myfile, $text);
$text = var_dump($__id);
fwrite($myfile, $text);
$text = var_dump($__rd);
fwrite($myfile, $text);
$text = var_dump($__i);
fwrite($myfile, $text);
$text = var_dump($__lp);
fwrite($myfile, $text);
fclose($myfile);
?>

I have also tried $_POST, $_GET and $_REQUEST but no result.

Is there any other way I can dump result from a API call?

Thanks for helping me out.

Example of fetching both $_GET and $_POST and write it to some logfile:

<?php
$rawpost = print_r($_POST, true);
$rawget = print_r($_GET, true);

$logfile = "/full/path/to/log/file/logfilename.log";
$fh = fopen($logfile,'a') or die("can't open the file");
fwrite($fh, "DATE: ".date('l jS \of F Y h:i:s A')."
");
fwrite($fh, "
RAW POST: =\t ".$rawpost."
");
fwrite($fh, "
RAW GET: =\t ".$rawget."
");
fwrite($fh, "-------------------------------------------------------
");
fclose($fh);
?>

With the above if someone posts data with the GET and POST method it will write it to the logfile. Your log file will need the proper write permissions if you are on a Linux system.

btw: The content of that index.php file is encoded with ionCube.