php - 数据 url 图片另存为 png

Question

假设我有来自 Apple 的数据 url:

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAANCAYAAABy6%2BR8AAAAlElEQVR42oWQQRHEIAxF10ElVAISVgo3bCABCUhYCZWAhEpAQpoD6bzJhNnDO0DyyA8fEXkppXyVCpLViDUfyqVIQN9JFMY637hrlCySFauL21E7KVWbAIGx56rnSLqc5KPXSLo3kySalPhTygFhRDtFC09EIsMeZJSGBj7Qveh3OJW89syImiH%2BIO2BOJX0XwA2%2BQEL4pAhSX4aBQAAAABJRU5ErkJggg%3D%3D

我想另存为 png 文件。我该怎么做？右键单击和“将图像另存为”不起作用(为什么？)所以我认为我应该使用带有“base64_decode”函数的 PHP 脚本:

    $img = "iVBORw0KGgoAAAANSUhEUgAAA9QAAAAkCAMAAABfcIIyAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAHVQTFRFAAAA%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F5YtmQAAAACd0Uk5TAAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmZiD6WAAAAdlJREFUeF7t3btuFEEQheFzunotGYkIERA4spn3fyeHiAgEEtsXB82s2eEJavR%2F0Wjyo75XWfHpw4MkSXNqCkA2lr2%2B%2Fvz63n15qpI0x5yTSAM52XaxJLVXf%2FkoaY6xQk2sgXy8Ql2KJf3wS5HG6HMMQg3kZNkuxVGKNLxJo48%2BxhxTpBrIx7JcXEqUKJI3zd77CjWLaiAle4U6Iixv6q33MfocTL%2BBlCy7OEqJqCFvs%2FV2m3%2BTaiAd6zb7rlHtrbc1VA%2Bm30BSa%2B%2B7RNSo4a21thbVTL%2BBnCy7rCV1rdXbtbXW%2B%2Bh%2Ft78BZLM2v6NE1Fov%2FrpC3Zl%2BA2l5H6lrrRe%2FXNu%2BqCbUQE57qGvsoW5t9D4H028gJculOKLUWuvFz%2B16O9NipAZSsm8nWpfq53ZlTQ3k9s%2BamlADZ0CogZMh1MDJEGrgZAg1cDL%2Fh5ojLSC1%2ByMtLp8A2R0un3BNFEjv%2FpooDzqA9O4fdPD0Esju8PSSIglAdsciCZQzArI7lDOat30yCg8CGe2FB1eovZcI7oMSwUBSq0TwWlQHxfyBEzgW86ftDpDase0ODfKA7A4N8mhlC2R318r2px%2BeQqLpPJDae9P5%2FmrVz491%2FWekBlKy7PXVfn9rb9xXsMD2wdOcAAAAAElFTkSuQmCC";

header("Content-type: image/png");
echo base64_decode($img);

这让我恢复了损坏的图像图标:

我应该如何解决这个问题并将数据 url 图片保存到文件？

Answer 1

你的代码没问题，但你的 base64 是 urlencoded。 I urldecoded it for you: iVBORw0KGgoAAAANSUhEUgAAAA0AAAANCAYAAABy6+R8AAAAlElEQVR42oWQQRHEIAxF10ElVAISVgo3bCABCUhYCZWAhEpAQpoD6bzJhNnDO0DyyA8fEXkppXyVCpLViDUfyqVIQN9JFMY637hrlCySFauL21E7KVWbAIGx56rnSLqc5KPXSLo3kySalPhTygFhRDtFC09EIsMeZJSGBj7Qveh3OJW89syImiH+IO2BOJX0XwA2+QEL4pAhSX4aBQAAAABJRU5ErkJggg==

或者自己做:base64_decode(urldecode($img));