如何防止PHP修剪长参数的结尾

这就是问题所在，我在谷歌上找不到太多东西，希望有人能找到答案。我的PHP文件发送电子邮件作为反馈给我，它需要5个参数，每当我向PHP文件发送长参数时，它就会修剪参数5的末尾，也就是最长的参数，我该如何修复呢?更明确地说，论点5几乎就是邮件正文。

<?php
include('Mail.php');
$arg1 = $argv[1]; //appName and version
$arg2 = $argv[2]; //ErrorMessage
$arg3 = $argv[3]; //ErrorData
$arg4 = $argv[4]; //ErrorSource
$arg5 = $argv[5]; //ErrorStackTrace
$arg1 = $_GET['arg1'];
$arg2 = $_GET['arg2'];
$arg3 = $_GET['arg3'];
$arg4 = $_GET['arg4'];
$arg5 = $_GET['arg5'];
$subject = $arg1 ;
$errorMessage = $arg2;
$ErrorData = $arg3;
$ErrorSource = $arg4;
$ErrorStackTrace = $arg5;
$recipients = "myemail";
$from = "errorreport@user.com" ;
$headers = array (
    'From' => $from,
    'To' => $recipients,
    'Subject' => $subject,
);
$body = "ErrorMessage: "."'n".$errorMessage."'n"."ErrorData: "."'n".$ErrorData."'n"."ErrorSource: "."'n".$ErrorSource."'n"."ErrorStackTrace: "."'n".$ErrorStackTrace;
$mail_object =& Mail::factory('smtp',
    array(
        'host' => 'prwebmail',
        'auth' => true,
        'username' => 'user',
        'password' => 'pass',       ));
$mail_object->send($recipients, $headers, $body);
?>