在GD中显示从右到左连接的语言(如波斯语和阿拉伯语)-可能的PHP错误 [英] Displaying right to left connected languages (like persian and Arabic) in GD - Possible PHP bug

问题描述

我想用php gd库创建一个带有文本的图像.

I want to create an image with a text on it with php gd library.

一切都很好，但是当我尝试使用imagefttext()从右向左连接的语言(如波斯语)写一个字时，我的文本从左向右(反向)呈现，并且字符不再连接.

everything is fine, but when I try to write a word from a right to left connected language (like Persian ) using imagefttext(), my text is rendering from left to right (inverse) and the chars are not connected any more .

关联字符的示例:ماه 未连接字符的示例:ماه

example of connected chars : ماه example of not connected chars : م ا ه

这是我的代码:

    header('Content-Type: image/jpeg');
    $thumb_path = "...";
    $font_path = "..."
    $img = imagecreatefromjpeg($thumb_path);
    $color = "...";
    // __month is a Persian word :  ( م ا ه -->  ماه )
    $text = $months." ".__month;
    imagefttext($img,29, 10, 230, 135, $color, $font_path, $text); // <--
    imagejpeg($img);

渲染的图像:

我知道我的问题不是编码.因为我已经尝试过了:

I know my problem is not encoding.because I already tried this :

$text = mb_convert_encoding($text, "HTML-ENTITIES", "UTF-8");

结果是一样的.

有一些可用的库可以解决此问题.并且我知道你们中的大多数人都不熟悉波斯语或阿拉伯语语言，但是我的问题是为什么gd本身不支持从右到左连接的语言?

there are some library available that maybe can solve this problem. and I know that most of you are not familiar with Persian or Arabic languages, but my question is why gd does not support right to left connected languages natively ?

这可能是gd库中的错误吗?

could this be a bug in gd library ?

推荐答案

似乎没有任何帮助(设置正确的语言环境)，原生PHP支持存在漏洞，这可能就是创建第三方软件包的原因:

Seems that nothing helps (setting correct locale), native PHP support is buggy, that's probably why 3rd party package was created:

魅力十足:

只需将库复制到您的PHP目录(不必是管理员).用法很简单:

Just copy the library to your PHP directory (don't have to be the admin). The usage is simple:

// init:
include('php-gd-farsi-master/FarsiGD.php');
$gd = new FarsiGD();

....
// then convert your text:
$tx = $gd->persianText($str, 'fa', 'normal');

您甚至不必设置正确的语言环境！ :-)

You don't even have to set the correct locale! :-)

整个示例代码:

<?php

include('php-gd-farsi-master/FarsiGD.php');

$gd = new FarsiGD();

// Create a 300x100 image
$im = imagecreatetruecolor(300, 100);
$red = imagecolorallocate($im, 0xFF, 0x00, 0x00);
$black = imagecolorallocate($im, 0x00, 0x00, 0x00);

// Make the background red
imagefilledrectangle($im, 0, 0, 299, 99, $red);

// Path to our ttf font file
//$font_file = './Vera.ttf';
$font_file = './cour.ttf';

// Draw the text 'PHP Manual' using font size 13
$text = imagecreatetruecolor(200, 60);
imagefilledrectangle($text, 0, 0, 200, 60, $red);
$str = '**ماه**';
$tx = $gd->persianText($str, 'fa', 'normal');
imagefttext($text, 24, 10, 10, 50, $black, $font_file,$tx );
$im = $text;

// Output image to the browser
header('Content-Type: image/png');

imagepng($im);
imagedestroy($im);
?>

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