19

我在 image_creator 中有图像创建代码。

<?php
header("Content-Type: image/jpeg");
$im = ImageCreateFromGif("photo.gif"); 
$black = ImageColorAllocate($im, 255, 255, 255);
$start_x = 10;
$start_y = 20;
Imagettftext($im, 12, 0, $start_x, $start_y, $black, 'verdana.ttf', "text to write");
Imagejpeg($im, '', 100);
ImageDestroy($im);
?> 

图像输出文件为 image.php,代码如下

<html>
<head>
</head>
<body>
    <img src="http://localhost/image_creator.php"/> 
</body>

</html>

当我运行 image.php 时,我只是得到一个空白页。为什么会这样?

4

2 回答 2

55

使用它向图像添加文本(从PHP for Kids复制)

<?php
//Set the Content Type
header('Content-type: image/jpeg');

// Create Image From Existing File
$jpg_image = imagecreatefromjpeg('sunset.jpg');

// Allocate A Color For The Text
$white = imagecolorallocate($jpg_image, 255, 255, 255);

// Set Path to Font File
$font_path = 'font.TTF';

// Set Text to Be Printed On Image
$text = "This is a sunset!";

// Print Text On Image
imagettftext($jpg_image, 25, 0, 75, 300, $white, $font_path, $text);

// Send Image to Browser
imagejpeg($jpg_image);

// Clear Memory
imagedestroy($jpg_image);
?>
于 2012-11-07T11:04:02.970 回答
5

这里的问题是, $black = ImageColorAllocate($im, 255, 255, 255);//<== 这不是黑色,它的白色//对于黑色应该是这样的,

$black = ImageColorAllocate($im, 0, 0, 0);
于 2013-12-11T11:45:08.090 回答