How to Convert a BLOB to an Image File in PHP?

Converting a Blob into an Image File in PHP

PHP provides various methods for converting BLOB data stored in a MySQL database into an image file. These methods rely on different image libraries that may already be installed on your system. Here are several options:

GD Library

<?php
$image = imagecreatefromstring($blob); 

ob_start(); 
imagejpeg($image, null, 80);
$data = ob_get_contents();
ob_end_clean();
echo '<img src="data:image/jpg;base64,' .  base64_encode($data)  . '" />';
?>

ImageMagick (iMagick) Library

<?php
$image = new Imagick();
$image->readimageblob($blob);
echo '<img src="data:image/png;base64,' .  base64_encode($image->getimageblob())  . '" />';
?>

GraphicsMagick (gMagick) Library

<?php
$image = new Gmagick();
$image->readimageblob($blob);
echo '<img src="data:image/png;base64,' .  base64_encode($image->getimageblob())  . '" />';
?>

Notes:

• The echo trick used in the examples displays multiple images when iterating through a MySQL result resource. Alternatively, you can use header() to output the image directly.
• The selected method will depend on the specific image library installed on your system.

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