Developing display images using Laravel

First the PHP native code is written in PHP, the results appear

The code is as follows:

Route::get('png', function () {    ob_start();    $im = @imagecreate(200, 50) or die("创建图像资源失败");    imagecolorallocate($im, 255, 255, 255);    $text_color = imagecolorallocate($im, 0, 0, 255);    imagestring($im, 5, 0, 0, "Hello world!", $text_color);    imagepng($im);    imagedestroy($im);    $content = ob_get_clean();    return response($content, 200, [        'Content-Type' => 'image/png',    ]);});

The problems that arise are:

Version: Laravel Framework version 5.1.35 (LTS)

Reply content:

First the PHP native code is written in PHP, the results appear

The code is as follows:

Route::get('png', function () {    ob_start();    $im = @imagecreate(200, 50) or die("创建图像资源失败");    imagecolorallocate($im, 255, 255, 255);    $text_color = imagecolorallocate($im, 0, 0, 255);    imagestring($im, 5, 0, 0, "Hello world!", $text_color);    imagepng($im);    imagedestroy($im);    $content = ob_get_clean();    return response($content, 200, [        'Content-Type' => 'image/png',    ]);});

The problems that arise are:

Version: Laravel Framework version 5.1.35 (LTS)

$im = @imagecreate(200, 50) or die("创建图像资源失败");imagecolorallocate($im, 255, 255, 255);$text_color = imagecolorallocate($im, 0, 0, 255);imagestring($im, 5, 0, 0, "Hello world!", $text_color);ob_start();imagepng($im);$content = ob_get_contents();imagedestroy($im);ob_end_clean();return $response = Response::make($content)->header('Content-Type', 'image/png');

The response header should be handled in a normative way Laravel , so you console will find that your Header header information is overwritten, preferably with one return .

Use Ob_clean () before the output,

This is the result of the adjustment of the above several programmers. Thank you

Route::get('png', function () {    ob_clean();    ob_start();    $im = @imagecreate(200, 50) or die("创建图像资源失败");    imagecolorallocate($im, 255, 255, 255);    $text_color = imagecolorallocate($im, 0, 0, 255);    imagestring($im, 5, 0, 0, "Hello world!", $text_color);    imagepng($im);    imagedestroy($im);    $content = ob_get_clean();    return response($content, 200, [        'Content-Type' => 'image/png',    ]);});

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