CODEWITHSUNDEEP
phpimagefile-handling
Vikram Anand Bhushan
Vikram Anand Bhushan

Reputation: 4896

How to validate an image before saving in a file

I have a function that saves the image in the respective folder.

I want to check if the image already exist in the folder , first with name if the name are same then with the SHA1 of the image

My current function looks something like this 

function descargarImagen($id,$url,$pais1)
{


    $ruta = rutaBaseImagen($id,$_POST['pais']);

    $contenido = file_get_contents($url);

    $ext = explode('.', $url);
    $extension = $ext[count($ext) -1];

    $imagen['md5'] = md5($contenido);
    $imagen['sha1'] = sha1($contenido);
    $imagen['nombre'] = $imagen['md5'].'.'.$extension;

    $ficherof = $pais[$pais1]['ruta_imagenes'].'/'.$ruta.'/'.$imagen['nombre'];
    $ficherof = str_replace('//', '/', $ficherof);

//Here before putting the file I want to check if the image already exist in the folder


    file_put_contents($ficherof, $contenido);

    $s = getimagesize($ficherof);

    $imagen['mime'] = $s["mime"];
    $imagen['size'] = $s[0].'x'.$s[1];
    $imagen['url'] = $urlbase_imagenes.'/'.$ruta.'/'.$imagen['nombre'];
    $imagen['url'] = str_replace('//', '/', $imagen['url']);
    $imagen['date'] = time();
    $imagen['fichero'] = $ficherof;

    return $imagen;
}

I am trying to validate in two ways 1.If the name of the image is present in the folder or not . 2.If present then check if the image is same or different , because there could be new image but same name

Any suggestion will be appreciated

Thanks in Advance

Upvotes: 0

Views: 303

Answers (2)

user789456
user789456

Reputation: 173

You can use this,

// Check if file already exists
if (file_exists($target_file)) {
    //echo "Sorry, file already exists.";

    /** 
    * validate images that are different but have same name 
    * we can use base64_encode function to compare the old and new image 
    * basics: http://php.net/manual/en/function.base64-encode.php 
    * online conversion help: http://freeonlinetools24.com/base64-image
    */
    $base64_encoded_new_image=base64_encode(file_get_contents($name_of_your_new_image_that_you_want_to_upload));
    $base64_encoded_old_image=base64_encode(file_get_contents($name_of_the_image_that_already_exists));
    if ($base64_encoded_new_image!=$base64_encoded_old_image) {
        /** so the images are actually not same although they have same name 
        * now do some other stuffs
        */
    }
}

for more information please visit http://www.w3schools.com/php/php_file_upload.asp

Upvotes: 2

rr-
rr-

Reputation: 14851

The hint given by this comment:

//Here before putting the file I want to check if the image already exist in the folder

makes me think you're asking for file_exists, which is the first thing that's shown if you search for "php file exist" in any search engine...

Upvotes: 2

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