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OPINIE UŻYTKOWNIKÓW
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Po wysłaniu do Dariusza problemu jeszcze nie opisanego w poradach, odpowiedź pojawia się na stronach już po 24 godzinach. To jedna z najważniejszych zalet serwisu! Za około 100 złotych rocznie mam profesjonalnego i doświadczonego konsultanta od technologii internetowych! Polecam serwis z poradami każdemu webmasterowi, niezależnie od stażu pracy i umiejętności.
Paweł Kowalski
grupa hiperMEDIA.pl
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PODRĘCZNIK PHP 5.x, 4.x, 3.x - częściowo spolszczony / źródło: www.php.net
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imagetypes (PHP 3 CVS only, PHP 4 >= 4.0.2, PHP 5) imagetypes -- Return the image types supported by this PHP build Descriptionint imagetypes ( void )
This function returns a bit-field corresponding to the image
formats supported by the version of GD linked into PHP. The
following bits are returned, IMG_GIF | IMG_JPG
| IMG_PNG | IMG_WBMP | IMG_XPM.
To check for PNG support, for example, do this:
Przykład 1. imagetypes() example |
<?php
if (imagetypes() & IMG_PNG) {
echo "PNG Support is enabled";
}
?>
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User Contributed Notesenyo
06-Nov-2003 04:32
Why not use this function?
<?php
function getSupportedImageTypes() {
$aSupportedTypes = array();
$aPossibleImageTypeBits = array(
IMG_GIF=>'GIF',
IMG_JPG=>'JPG',
IMG_PNG=>'PNG',
IMG_WBMP=>'WBMP'
);
foreach ($aPossibleImageTypeBits as $iImageTypeBits => $sImageTypeString) {
if (imagetypes() & $iImageTypeBits) {
$aSupportedTypes[] = $sImageTypeString;
}
}
return $aSupportedTypes;
}
?>
jocke at selincite dot IHATESP4M dot com
16-Oct-2003 11:56
I wrote this function that returns an array with the supported image types
<?php
function getSupportedImageTypes() {
$aSupportedTypes = array();
$aPossibleImageTypeBits = array(
"IMG_GIF",
"IMG_JPG",
"IMG_PNG",
"IMG_WBMP"
);
foreach ($aPossibleImageTypeBits as $iIndex => $sImageTypeBits) {
$sEval = "if (";
$sEval .= "imagetypes() & " . $sImageTypeBits . "";
$sEval .= ") { return TRUE; } else { return FALSE; }";
if (eval($sEval)) {
$aSupportedTypes[] = str_replace("IMG_", "", $sImageTypeBits);
}
}
return $aSupportedTypes;
}
?>
Hope that helps someone :)
/Jocke Selin
PS, if you know of a better way that doesn't include eval(), please let me know.
jaldinger (at) consulturdorado (dot) com
08-Jan-2003 09:31
Please note that if only "GIF Read Support" is enabled, the
IMG_GIF bit will not be returned (at least on my system:
PHP 4.3.0/RH Linux 7.2).
To work around this issue, and also the issue that there is no
function that can tell me what image format a GD resource ID
refers to, I use the following switch statement to map the exif
IMAGETYPE_* constants to the GD IMG_* constants:
switch (exif_imagetype($file['tmp_name'])) {
case IMAGETYPE_GIF:
$image_type = IMG_GIF;
break;
case IMAGETYPE_JPEG:
$image_type = IMG_JPG;
break;
case IMAGETYPE_PNG:
$image_type = IMG_PNG;
break;
case IMAGETYPE_WBMP:
$image_type = IMG_WBMP;
break;
default:
$image_type = 0;
break;
}
store this value together with the image data in a database
and later use the following IF statement to see if I can work
with that image (create a thumbnail, etc...)
if ($image_type & (imagetypes() | IMG_GIF)) {
return $this->createJpegThumbailFromString($data, 46, 27);
} else {
return file_get_contents($_SERVER['DOCUMENT_ROOT'] .
'/gfx/no-thumbnail.jpg');
}
HTH anybody...
Joerg.
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