/ / Načítať obrázok z mysql a zmeniť veľkosť pomocou timthumb v php - php, mysql, spracovanie obrazu, timthumb

Načítať obrázok z mysql a zmeniť veľkosť pomocou timthumb v php - php, mysql, spracovanie obrazu, timthumb

Používam timthumb.php na zmenu veľkosti obrázkov. Funguje to s lokálnym obrázkom, ale čo keď mám adresu URL, ktorá bude načítať obraz z MYSQL a potom chcem zmenu veľkosti tohto obrázka za letu pred zobrazením? Snažil som sa niekoľkými spôsobmi. moja adresa URL, ktorá načítá obrázok z MYSQL je

http://somedomain/final/getImage.php?id=1234

Chcem urobiť niečo ako nižšie, ktoré nefunguje

<img src="/images/php_helpers/timthumb.php?src=http://somedomain/final/getImage.php?id=1234&w=260" alt="" />

Akákoľvek pomoc by bola veľmi cenená. Vďaka

odpovede:

1 pre odpoveď č. 1

Ahoj, toto je trieda zmeny veľkosti obrazu. Prosím, použite to vo svojej žiadosti. Ak potrebujú zmeny závisia od vašej žiadosti, urobte to v tomto.

<?php
/**
* Resize image class will allow you to resize an image
*
* Can resize to exact size
* Max width size while keep aspect ratio
* Max height size while keep aspect ratio
* Automatic while keep aspect ratio
*/
class ResizeImage
{
private $ext;
private $image;
private $newImage;
private $origWidth;
private $origHeight;
private $resizeWidth;
private $resizeHeight;
/**
* Class constructor requires to send through the image filename
*
* @param string $filename – Filename of the image you want to resize
*/
public function __construct( $filename )
{
if(file_exists($filename))
{
$this->setImage( $filename );
} else {
throw new Exception(‘Image ‘ . $filename . ‘ can not be found, try another image.’);
}
}
/**
* Set the image variable by using image create
*
* @param string $filename – The image filename
*/
private function setImage( $filename )
{
$size = getimagesize($filename);
$this->ext = $size["mime"];
switch($this->ext)
{
// Image is a JPG
case ‘image/jpg’:
case ‘image/jpeg’:
// create a jpeg extension
$this->image = imagecreatefromjpeg($filename);
break;
// Image is a GIF
case ‘image/gif’:
$this->image = @imagecreatefromgif($filename);
break;
// Image is a PNG
case ‘image/png’:
$this->image = @imagecreatefrompng($filename);
break;
// Mime type not found
default:
throw new Exception(“File is not an image, please use another file type.”, 1);
}
$this->origWidth = imagesx($this->image);
$this->origHeight = imagesy($this->image);
}
/**
* Save the image as the image type the original image was
*
* @param  String[type] $savePath     – The path to store the new image
* @param  string $imageQuality       – The qulaity level of image to create
*
* @return Saves the image
*/
public function saveImage($savePath, $imageQuality=”100″, $download = false)
{
switch($this->ext)
{
case ‘image/jpg’:
case ‘image/jpeg’:
// Check PHP supports this file type
if (imagetypes() & IMG_JPG) {
imagejpeg($this->newImage, $savePath, $imageQuality);
}
break;
case ‘image/gif’:
// Check PHP supports this file type
if (imagetypes() & IMG_GIF) {
imagegif($this->newImage, $savePath);
}
break;
case ‘image/png’:
$invertScaleQuality = 9 – round(($imageQuality/100) * 9);
// Check PHP supports this file type
if (imagetypes() & IMG_PNG) {
imagepng($this->newImage, $savePath, $invertScaleQuality);
}
break;
}
if($download)
{
header(‘Content-Description: File Transfer’);
header(“Content-type: application/octet-stream”);
header(“Content-disposition: attachment; filename= “.$savePath."");
readfile($savePath);
}
imagedestroy($this->newImage);
}
/**
* Resize the image to these set dimensions
*
* @param  int $width            - Max width of the image
* @param  int $height           - Max height of the image
* @param  string $resizeOption – Scale option for the image
*
* @return Save new image
*/
public function resizeTo( $width, $height, $resizeOption = ‘default’ )
{
switch(strtolower($resizeOption))
{
case ‘exact’:
$this->resizeWidth = $width;
$this->resizeHeight = $height;
break;
case ‘maxwidth’:
$this->resizeWidth  = $width;
$this->resizeHeight = $this->resizeHeightByWidth($width);
break;
case ‘maxheight’:
$this->resizeWidth  = $this->resizeWidthByHeight($height);
$this->resizeHeight = $height;
break;
default:
if($this->origWidth > $width || $this->origHeight > $height)
{
if ( $this->origWidth > $this->origHeight ) {
$this->resizeHeight = $this->resizeHeightByWidth($width);
$this->resizeWidth  = $width;
} else if( $this->origWidth < $this->origHeight ) {
$this->resizeWidth  = $this->resizeWidthByHeight($height);
$this->resizeHeight = $height;
}
} else {
$this->resizeWidth = $width;
$this->resizeHeight = $height;
}
break;
}
$this->newImage = imagecreatetruecolor($this->resizeWidth, $this->resizeHeight);
imagecopyresampled($this->newImage, $this->image, 0, 0, 0, 0, $this->resizeWidth, $this->resizeHeight, $this->origWidth, $this->origHeight);
}
/**
* Get the resized height from the width keeping the aspect ratio
*
* @param  int $width – Max image width
*
* @return Height keeping aspect ratio
*/
private function resizeHeightByWidth($width)
{
return floor(($this->origHeight/$this->origWidth)*$width);
}
/**
* Get the resized width from the height keeping the aspect ratio
*
* @param  int $height – Max image height
*
* @return Width keeping aspect ratio
*/
private function resizeWidthByHeight($height)
{
return floor(($this->origWidth/$this->origHeight)*$height);
}
}
?>

<!– Below functions is to used for resizing and saving the image –>


<?php
$resize = new ResizeImage(‘images/1.jpg’);
$resize->resizeTo(500, 500, ‘exact’);
$resize->saveImage(‘images/5.jpg’);
$resize->resizeTo(500, 500, ‘maxWidth’);
$resize->saveImage(‘images/6.png’);
$resize->resizeTo(500, 500, ‘maxHeight’);
$resize->saveImage(‘images/7.png’);
$resize->resizeTo(500, 500);
$resize->saveImage(‘images/8.png’);
//$resize->resizeTo(500, 500, ‘exact’);
//$resize->saveImage(‘images/9.png’, “100″, true);
echo “<img src=’images/1.jpg’>”;
echo “<br>”;
echo “<img src=’images/6.png’>”;
echo “<br>”;
echo “<img src=’images/7.png’>”;
echo “<br>”;
echo “<img src=’images/8.png’>”;
echo “<br>”;
echo “<img src=’images/9.jpg’>”;
//echo “<img src=’images/5.jpg’ height=’600′ width=’1000′>”;
?>

Ak máte nejaké problémy s použitím v tomto kóde, prosím zdieľajte so sebou. Pomôžem ti.


0 pre odpoveď č. 2

mali by ste použiť cestu obrázka v značke src namiesto php path.like

<img src="/images/timthumb.php?src=/images/filename.jpg&h=150&w=150&zc=1" alt="some text" />

ak chcete vygenerovať cestu z databázy, mali by ste napísať niečo podobné

<?php
$sql = "SELECT image FROM image_tbl WHERE ID ="$image_id"";
$result = mysql_query($sql);
$image = mysql_result($result, 0);

echo "<img src="/images/" $image""/>";

?>