Question

我想从包含的PHP文件创建一个图像，有一个未定义变量的错误：

的index.php

<?php
// get servers and domains
$serSel = 'SELECT * FROM servers';
$serReq = $connexion->query($serSel);
$serRes = $serReq->fetchAll();
$totalSer = count($serRes);

foreach($serRes as $Serv)
{

$s_global_size  = $Serv['s_global_size'];
$s_used_size    = $Serv['s_used_size'];
$s_creation     = $Serv['s_creation'];
$s_expiry       = $Serv['s_expiry'];

$diskSpace = ($e_name == 'domain')  ?   '-'  : format_bytes($s_global_size);

echo $diskSpace;

$diskUsage = ($e_name == 'domain')  ?   '-'  : format_bytes($s_used_size);

echo $diskUsage;

$s_left_size = ($s_global_size - $s_used_size);
$sLeftSize = ($e_name == 'domain')  ?   '-'  : format_bytes($s_left_size);
echo $sLeftSize;

}


echo '<img src="Idara/Statistics/webdata_circle.php">';

＆GT;

webdata_circle.php

<?php
// create image
$image = imagecreatetruecolor(180, 180);

$usagePerc = ($diskUsage * 360)/$diskSpace;

// allocate some colors
$red = imagecolorallocate($image, 192, 0, 0);
$red1 = imagecolorallocate($image, 192, 20, 0);
$green = imagecolorallocate($image, 0, 133 ,62);
$green1 = imagecolorallocate($image, 0, 140 ,62);
$trans = imagecolorallocate($image, 0, 0, 0); // transparent background

// Make the background transparent
imagecolortransparent($image, $trans);


imagefilledarc($image, 80, 80, 150, 150, 0, 360, $red, IMG_ARC_PIE);
imagefilledarc($image, 80, 80, 150, 150, 0, $usagePerc, $green, IMG_ARC_PIE);

// flush image
header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
?>

返回的错误是：

 PHP Notice:  Undefined variable: diskUsage in webdata_circle.php on line 8
 PHP Notice:  Undefined variable: diskSpace in webdata_circle.php on line 8
 PHP Warning:  Division by zero in webdata_circle.php on line 8

提前致谢

注意：这是完整的代码，我希望它会有所帮助

Answer 1

您需要在第二行的webdata_circle.php添加以下行：

$diskPath = dirname(__FILE__); 
$diskUsage  = disk_total_space ($diskPath); 
$diskUsage  = disk_free_space ($diskPath);

从包含的PHP文件创建图像

1 个答案: