Have Gd Get Image from Binary String

Have GD get image from binary string

imagecreatefromstring() should do the trick. I think the function example in the manual is almost exactly what you need:

$im = imagecreatefromstring($data);
if ($im !== false) {
    header('Content-Type: image/png');
    imagepng($im);
    imagedestroy($im);
}
else {
    echo 'An error occurred.';
}

Where $data is your binary data string from the database.

PHP GD: How to get imagedata as binary string?

One way is to tell GD to output the image, then use PHP buffering to capture it to a string:

$imagedata = imagecreatefrompng($imagefile);
ob_start();
imagepng($imagedata);
$stringdata = ob_get_contents(); // read from buffer
ob_end_clean(); // delete buffer
$zdata = gzdeflate($stringdata);

How to convert binary image data to image file and save it in folder in php

Try the imagecreatefromstring method, which is documented here.

Convert GD image back to binary data

Use imagejpeg, imagepng, or similar. Use output buffering if you want to dump the result to a string, rather than a file:

ob_start();
imagejpeg($im);
$image_string = ob_get_contents();
ob_end_flush();

How to achieve the reverse effect of imagecreatefromstring in PHP?

There's no way to tell GD to return your image as a binary string, unfortunately. GD only supports writing to a file or to the screen. What we can do though is use output buffering to capture its output and then put it in a string.

ob_start();
imagepng($img);
$image = ob_get_clean();

echo 'data:image/png;base64,'.base64_encode($image);

PHP Get Image size when image is stored as byte array

You can use imagesx and imagesy on gd resources.

PHP : binary image data, checking the image type

The bits start with:

$JPEG = "\xFF\xD8\xFF"
$GIF  = "GIF"
$PNG  = "\x89\x50\x4e\x47\x0d\x0a\x1a\x0a"
$BMP  = "BM"
$PSD  = "8BPS"
$SWF  = "FWS"

The other ones I wouldn't know right now, but the big 3 (jpeg,gif,png) usually cover 99%. So, compare the first bytes to those string, and you have your answer.

Use PHP / GD to Save Binary Data as a JPEG Without Losing Metadata

Why don't you just save $binary_data instead of passing it through GD
file_put_contents($directory, $binary_data)

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