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a89aaf6c38
If the string is too short, we should treat this the same way as an unrecognized image type. This function should be usable to determine whether something is a valid image without doing any checks beforehand.
69 lines
1.6 KiB
PHP
69 lines
1.6 KiB
PHP
--TEST--
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imagecreatefromstring
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--SKIPIF--
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<?php
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if (!function_exists('imagecreatefromstring')) die("skip gd extension not available\n");
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if (!function_exists('imagepng')) die("skip no imagpng()\n");
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?>
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--FILE--
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<?php
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$dir = __DIR__;
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$im = imagecreatetruecolor(5,5);
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imagefill($im, 0,0, 0xffffff);
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imagesetpixel($im, 3,3, 0x0);
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imagepng($im, $dir . '/tc.png');
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$im_string = file_get_contents(__DIR__ . '/tc.png');
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$im = imagecreatefromstring($im_string);
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echo 'createfromstring truecolor png: ';
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if (imagecolorat($im, 3,3) != 0x0) {
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echo 'failed';
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} else {
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echo 'ok';
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}
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echo "\n";
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unlink($dir . '/tc.png');
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$im = imagecreate(5,5);
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$c1 = imagecolorallocate($im, 255,255,255);
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$c2 = imagecolorallocate($im, 255,0,0);
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imagefill($im, 0,0, $c1);
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imagesetpixel($im, 3,3, $c2);
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imagepng($im, $dir . '/p.png');
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$im_string = file_get_contents(__DIR__ . '/p.png');
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$im = imagecreatefromstring($im_string);
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echo'createfromstring palette png: ';
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$c = imagecolorsforindex($im, imagecolorat($im, 3,3));
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$failed = false;
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if ($c['red'] != 255 || $c['green'] != 0 || $c['blue'] != 0) {
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echo 'failed';
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} else {
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echo 'ok';
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}
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echo "\n";
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unlink($dir . '/p.png');
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//empty string
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try {
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imagecreatefromstring('');
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} catch (ValueError $exception) {
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echo $exception->getMessage() . "\n";
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}
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//random string > 12
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$im = imagecreatefromstring(' asdf jklp foo');
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?>
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--EXPECTF--
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createfromstring truecolor png: ok
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createfromstring palette png: ok
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Warning: imagecreatefromstring(): Data is not in a recognized format in %s on line %d
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Warning: imagecreatefromstring(): Data is not in a recognized format in %s on line %d
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