Calculate and convert byte file size to kB, MB, GB, etc

Question

Hello would like to know how I can complement the code below so that the filesize via remote URL returns the result of the file size on MB because the current code is returning the result of the file size in bytes.

function remotefileSize($url) {
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_NOBODY, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
    curl_exec($ch);
    $filesize = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);
    curl_close($ch);
    if ($filesize) return $filesize;
}


echo remotefileSize('http://thumb.mais.uol.com.br/15233302-medium.jpg');

Answer 1

The base calculation is 1024 because 1kb is 1024 bytes.

Based on this, create a function that determines the type of measure.

/*
    1024000 bytes = 1 kilobytes
    1000 kb = 1 megabyte
    1000 mb = 1 gigabyte
    e assim vai..
*/
    function filesize_formatted($path)
    {
        $size = filesize($path);
        $units = array( 'B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB');
        $power = $size > 0 ? floor(log($size, 1024)) : 0;
        return number_format($size / pow(1024, $power), 2, '.', ',') . ' ' . $units[$power];
    }

    echo filesize_formatted( 2048 );

In this example, in order to reduce code, we use a mathematical PHP function called pow(), which makes potential expression calculations.

Important, in this example returns the result formatted with 2 decimal places. The formatting of the result may vary with the need of each one. Therefore, be aware and modify according to your need.

More specifically, referring to your code, remove all unnecessary chunk:

// Pega o tamanho do arquivo remoto
$tamanhoarquivo = $filesize;

//
$medidas = array('KB', 'MB', 'GB', 'TB');

/* Se for menor que 1KB arredonda para 1KB */
if($tamanhoarquivo < 999){
$tamanhoarquivo = 1024;
}

for ($i = 0; $tamanhoarquivo > 999; $i++){
$tamanhoarquivo /= 1024;
}

return round($tamanhoarquivo) . $medidas[$i - 1];

Trade for this:

    function filesize_formatted($path)
    {
        $size = filesize($path);
        $units = array( 'B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB');
        $power = $size > 0 ? floor(log($size, 1024)) : 0;
        return number_format($size / pow(1024, $power), 2, '.', ',') . ' ' . $units[$power];
    }

    return filesize_formatted( $filesize);

Answer 2

If the current result was returning in bytes it was only divide the result by 1048576 and you would have it in MB

$tamanhoarquivo = $filesize;     /*Retorna o tamanho do arquivo em bytes*/

Soon:

$tamanhoarquivo = $filesize/1024;     /*Retorna o tamanho do arquivo em kbytes*/

$tamanhoarquivo = $filesize/1048576;  /*Retorna o tamanho do arquivo em Megabytes*/

Answer 3

First it is important to define that KB NO is 1024, it was already solved long ago.

To avoid confusion, because Kilo means 1000, they defined the prefix Kibi that has the multiplier 1024. Soon, we have Kib, Mib, Gib and in some operating systems are already using the correct units. IEC Standard Prefixes

Now as for the code, to be able to convert to arbitrary units:

function ConverterPrefixoBinario ($Valor, $UnidadeOrigem, $UnidadeDestino, $Precisão = 2)
{
    $Unidades = array (
        'B' => 1, 
        'KB' => 1000, 'MB' => 1000000, 'GB' => 1000000000, 'TB' => 1000000000,
        'KiB' => 1024, 'MiB' => 1048576, 'GiB' => 1073741824, 'TiB' => 1099511627776
    );

    $ValorBytes = $Valor * $Unidades [$UnidadeOrigem];

    return round($ValorBytes / $Unidades [$UnidadeDestino], $Precisão) . $UnidadeDestino;
}

// 0,15GiB
echo ConverterPrefixoBinario (150, 'MiB', 'GiB');

// 1,5MiB
echo ConverterPrefixoBinario (1572864, 'B', 'MiB');

Answer 4

I believe I have reached a solution I leave the code here for those who want to use. I thank Daniel Gomes for the guidelines in the comments.

If someone has some more simplified or different way feel free to put your answer because it will help me in my studies in php.

<?php 


    // Função que verifica o tamanho do arquivo remoto via url

    function remotefileSize($url) {
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_NOBODY, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
    curl_exec($ch);
    $filesize = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);
    curl_close($ch);

    // Pega o tamanho do arquivo remoto
    $tamanhoarquivo = $filesize;

    //
    $medidas = array('KB', 'MB', 'GB', 'TB');

    /* Se for menor que 1KB arredonda para 1KB */
    if($tamanhoarquivo < 999){
    $tamanhoarquivo = 1024;
    }

    for ($i = 0; $tamanhoarquivo > 999; $i++){
    $tamanhoarquivo /= 1024;
    }

    return round($tamanhoarquivo) . $medidas[$i - 1];
    }

    echo 'O tamamnho do arquivo da url http://thumb.mais.uol.com.br/15233302-medium.jpg e '.remotefileSize('http://thumb.mais.uol.com.br/15233302-medium.jpg');



?>