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How to resize an image by height in PHP using rethumb?

To resize an image or photo in PHP use the following code:

    $param_operation = "height";
    $param_value = 100; // New height in pixels.
    $image_url = "";
    $image_filename = "resized-image.jpg";

    file_put_contents($image_filename, file_get_contents("$param_operation/$param_value/$image_url"));

Start using this example now

Use the following commands to get started:

$ git clone
$ cd rethumb-php-examples
$ php resize-by-height.php

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