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imagecreatefromstring

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

imagecreatefromstring — Create a new image from the image stream in the string

Descrizione

imagecreatefromstring(string $data): GdImage|false

imagecreatefromstring() returns an image identifier representing the image obtained from the given data. These types will be automatically detected if your build of PHP supports them: JPEG, PNG, GIF, BMP, WBMP, GD2, WEBP and AVIF.

Elenco dei parametri

data

A string containing the image data.

Valori restituiti

An image object will be returned on success. false is returned if the image type is unsupported, the data is not in a recognised format, or the image is corrupt and cannot be loaded.

Errori/Eccezioni

imagecreatefromstring() raises an E_WARNING level error, if the data is not in a recognized format.

Log delle modifiche

Versione Descrizione
8.0.0 On success, this function returns a GDImage instance now; previously, a resource was returned.
7.3.0 WEBP is supported now (if supported by the libgd in use).

Esempi

Example #1 imagecreatefromstring() example

<?php
$data = 'iVBORw0KGgoAAAANSUhEUgAAABwAAAASCAMAAAB/2U7WAAAABl'
. 'BMVEUAAAD///+l2Z/dAAAASUlEQVR4XqWQUQoAIAxC2/0vXZDr'
. 'EX4IJTRkb7lobNUStXsB0jIXIAMSsQnWlsV+wULF4Avk9fLq2r'
. '8a5HSE35Q3eO2XP1A1wQkZSgETvDtKdQAAAABJRU5ErkJggg==';
$data = base64_decode($data);

$im = imagecreatefromstring($data);
if ($im !== false) {
header('Content-Type: image/png');
imagepng($im);
}
else {
echo 'An error occurred.';
}
?>

Il precedente esempio visualizzerà qualcosa simile a:

Output of example : imagecreatefromstring()

Vedere anche: