PHP / Codeigniter - How to convert image to byte array?

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0

I want to record here my solution to this problem.

$data = file_get_contents("/ImagePath/Image.jpg");

$array = array(); 

foreach(str_split($data) as $char){ 
   array_push($array, ord($char)); 
}
php array codeigniter byte

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2 answers

2

Tried to read image straight as binary data?

<?php
$filename = "image.png";
$file = fopen($filename, "rb");
$contents = fread($file, filesize($filename));
fclose($file);
?>

If sending via form, convert $contents for Base64 using base64_encode($contents).

1

The answer from @Felipedouradinho was nice. But, if you want to create an array of bytes, you would have to do so.

    $filename = "image.png";

    $file = fopen($filename, "rb");

    $tamanho_do_buffer = 4096;

    $array = array();

    while (! feof($file)) {

        $array[] = fread($file, $tamanho_do_buffer);
    }

    fclose($file);

Use file_get_contents in this case is not recommended. The file_get_contents returns all the contents of the file. Already the fopen combined with the fread sets a specific buffer face size that will be opened from the file, thus avoiding an overload in memory (depending, your script may generate an error if memory usage reaches the limit set in PHP)

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