Resize image that comes by POST in PHP

Question

Resize image that comes by POST in PHP

Navigation

#1 by (1 votes)
#2 by (0 votes)

4

How can I resize an image that comes to me by POST from a form?

$rutaFichero = '/img/' . basename($_FILES['imagenNoticia']['name']);

if (move_uploaded_file($_FILES['imagenNoticia']['tmp_name'], $rutaFichero))
        {
            $imagenOriginal = imagecreatefromjpeg($rutaFichero);
            $maxAncho = 500;
            $maxAlto = 500;
            list($ancho, $alto) = getimagesize($rutaFichero);
            $xRatio = $maxAncho / $ancho;
            $yRatio = $maxAlto / $alto;

            if(($ancho <= $maxAncho) && ($alto <= $maxAlto))
            {
                $anchoFinal = $ancho;
                $altoFinal = $alto;
            }
            else if(($xRatio * $alto) < $maxAlto)
            {
                $altoFinal = ceil($xRatio * $alto);
                $anchoFinal = $maxAncho;
            }
            else
            {
                $anchoFinal = ceil($yRatio * $ancho);
                $altoFinal = $maxAlto;
            }

            //$rsr_org = imagecreatefromjpeg("image.jpg");
            //$tmp = imagescale($imagenOriginal, $anchoFinal, $altoFinal,  IMG_BICUBIC_FIXED);
            //imagejpeg($tmp, basename($_FILES['imagenNoticia']['name']);

            $tmp = imagecreatetruecolor($anchoFinal, $altoFinal);
            $resultado = imagecopyresampled($tmp, $imagenOriginal, 0, 0, 0, 0, $anchoFinal, $altoFinal, $ancho, $alto);
            imagedestroy($imagenOriginal);
        }

I have used this code, but it does not resize my image. Any possible solution ?, Or any class that works with php versions prior to 5.3? Thanks

php post

asked by 15.06.2016 в 09:52

source

2 answers

0

I leave you a function that I use, in case it helps you

function redimensionarJPEG ($origen, $destino, $ancho_max, $alto_max, $fijar) {

$info_imagen= getimagesize($origen);
$ancho=$info_imagen[0];
$alto=$info_imagen[1];
if ($ancho>=$alto)
{
    $nuevo_alto= round($alto * $ancho_max / $ancho,0);
    $nuevo_ancho=$ancho_max;
}
else
{
    $nuevo_ancho= round($ancho * $alto_max / $alto,0);
    $nuevo_alto=$alto_max;
}
switch ($fijar)
{
    case "ancho":
        $nuevo_alto= round($alto * $ancho_max / $ancho,0);
        $nuevo_ancho=$ancho_max;
        break;
    case "alto":
        $nuevo_ancho= round($ancho * $alto_max / $alto,0);
        $nuevo_alto=$alto_max;
        break;
    default:
        $nuevo_ancho=$nuevo_ancho;
        $nuevo_alto=$nuevo_alto;
        break;
}
$imagen_nueva= imagecreatetruecolor($nuevo_ancho,$nuevo_alto);
$imagen_vieja= imagecreatefromjpeg($origen);
imagecopyresampled($imagen_nueva, $imagen_vieja, 0, 0, 0, 0,$nuevo_ancho, $nuevo_alto, $ancho, $alto);
imagejpeg($imagen_nueva,$destino);
imagedestroy($imagen_nueva);
imagedestroy($imagen_vieja);
}

answered by 25.06.2016 в 21:52

Problem with getHighestColumn () PHPExcel Why can not I insert more than 253 records in mysql?

score 1 · Accepted Answer

I have found this that can help you (I think the problem you have is in the ratio):

$fn = $_FILES['imagenNoticia']['name'];
$size = getimagesize($fn);
$ratio = $size[0]/$size[1]; // width/height
if( $ratio > 1) {
    $width = 500;
    $height = 500/$ratio;
}
else {
    $width = 500*$ratio;
    $height = 500;
}
$src = imagecreatefromstring(file_get_contents($fn));
$dst = imagecreatetruecolor($width,$height);
imagecopyresampled($dst,$src,0,0,0,0,$width,$height,$size[0],$size[1]);
imagedestroy($src);
imagepng($dst,$target_filename_here); // adjust format as needed
imagedestroy($dst);