PHP / HTMLの画像にbase64文字列（gif）をデコードする方法
PHP/HTMLで画像に変換したいbase64エンコードされた文字列があります。
ここに私が持っているものがあります：
$data = "R0lGODdhAAGAAKIAAP38+/3h3cjN5P3HwgAAAP8AoP8AGv8EIywAAAAAAAGAAAAD.....";
echo base64_decode($data);
// OR
echo '<img src="data:image/gif;base64,' . base64_decode($data) . '" />';
それらのどれも動作しません。助言がありますか？
とても有難い！カタリン
最初のケースでは、デコードされた画像データをエコーする前にこれを追加する必要があります：
header("Content-type: image/gif");
2番目のケースでは、代わりにこれを使用します。
echo '<img src="data:image/gif;base64,' . $data . '" />';
愚かな質問：MIMEタイプは正しいですか？あなたのbase64コードはgifファイルを表していますか????
これは、phpなしで、htmlのみのimage/pngを使用した例で、機能します。
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やってみなよ。
これで、上記で例示したphpを使用した同じbase64コードですが、適切なMIMEタイプ（image/png）を使用しています。
<?php
echo "<img alt=Embedded Image src=\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEEAAABBCAIAAAABlV4SAAAABGdBTUEAAK/INwWK6QAAABl0RVh0
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?>
だから、これはコードです：
echo "<img alt=Embedded Image src=\"data:image/png;base64,[BASE64CODE]\" />";
エコータグに二重引用符を使用しているので、imgタグ内のものを無視するようにphpに指示する必要があることに注意してください。それ以外は、あなたはいいです
乾杯
PC
echo '<img src="data:image/gif;base64,' . $data . '" />'
トリックを行う必要があります。
データをエコーしてコンテンツタイプ（gif画像）を指定する前に、header()関数を使用する必要があります。それ以外の場合、ブラウザはそれをhtmlとして解釈します。
Base64_encode関数を使用して画像を表示する
$ret = fopen($fullurl, 'r', true, $context);
$contents = stream_get_contents($ret);
$base64 = 'data:image/PNG;base64,' . base64_encode($contents);
echo "<img src=$base64 />" ;