php生成餐饮订单小票图片，图片长度如何适应内容？-PHP Tutorial-php.cn

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php生成餐饮订单小票图片，图片长度如何适应内容？

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Jun 06, 2016 pm 08:21 PM

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在做一个餐饮的系统，先利用php生成好订单小票，然后存放在目录里。python脚本定时检测目录，有图片时则传给打印机打印。
现在遇到一个问题就是，php生成图片是先要指定宽高，但有的订单菜品多或少，导致订单小票内容的长度是不同的，在php里面如何生成一个适应内容的图片呢？想了很久都没有头绪，请大家帮帮忙。

回复内容：

可以使用 imagettfbbox 来获得ttf字体下的指定文本生成的边框的宽高

很简单，假设一张空白的菜单图片最小长度为10cm，有一条菜品，图片长度就加1cm 。生成的时候，计算下有多少条菜品。
那么长度就可以自适应了
图片长度 = 最小长度 + 菜品条数*每条要加的长度

生成图片之前先计算好高度

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