getimagesize
Example #1 getimagesize() and MIME types
<?php
$size = getimagesize($filename);
$fp = fopen($filename, "rb");
if ($size && $fp) {
header("Content-type: {$size['mime']}");
fpassthru($fp);
exit;
} else {
// error
}
?>Example #2 getimagesize() example
<?php
list($width, $height, $type, $attr) = getimagesize("img/flag.jpg");
echo "<img src="./\"img/flag.jpg\" $attr alt=\"getimagesize() example\" />";
?>Example #3 getimagesize (URL)
<?php
$size = getimagesize("http://www.example.com/gifs/logo.gif");
// if the file name has space in it, encode it properly
$size = getimagesize("http://www.example.com/gifs/lo%20go.gif");
?>Example #4 getimagesize() returning IPTC
<?php
$size = getimagesize("testimg.jpg", $info);
if (isset($info["APP13"])) {
$iptc = iptcparse($info["APP13"]);
var_dump($iptc);
}
?>imagecopyresized
Example #1 Resizing an image This example will display the image at half size.<?php
// File and new size
$filename = 'test.jpg';
$percent = 0.5;
// Content type
header('Content-type: image/jpeg');
// Get new sizes
list($width, $height) = getimagesize($filename);
$newwidth = $width * $percent;
$newheight = $height * $percent;
// Load
$thumb = imagecreatetruecolor($newwidth, $newheight);
$source = imagecreatefromjpeg($filename);
// Resize
imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
// Output
imagejpeg($thumb);
?>
<?php
//use this line if you get the error message of using too much memory (strip '//')
//ini_set ( "memory_limit", "48M");
$target_width = 800;
$target_height = 600;
if (ob_get_level() == 0) ob_start();
if ($handle = opendir('files/')) {
while (false !== ($file = readdir($handle))) {
if ($file != "." && $file != "..") {
$destination_path = './files/';
$target_path = $destination_path . basename($file);
$extension = pathinfo($target_path);
$allowed_ext = "jpg, gif, png, bmp, jpeg, JPG";
$extension = $extension[extension];
$allowed_paths = explode(", ", $allowed_ext);
$ok = 0;
for($i = 0; $i < count($allowed_paths); $i++) {
if ($allowed_paths[$i] == "$extension") {
$ok = "1";
}
}
if ($ok == "1") {
if($extension == "jpg" || $extension == "jpeg" || $extension == "JPG"){
$tmp_image=imagecreatefromjpeg($target_path);
}
if($extension == "png") {
$tmp_image=imagecreatefrompng($target_path);
}
if($extension == "gif") {
$tmp_image=imagecreatefromgif($target_path);
}
$width = imagesx($tmp_image);
$height = imagesy($tmp_image);
//calculate the image ratio
$imgratio = ($width / $height);
if ($imgratio>1) {
$new_width = $target_width;
$new_height = ($target_width / $imgratio);
} else {
$new_height = $target_height;
$new_width = ($target_height * $imgratio);
}
$new_image = imagecreatetruecolor($new_width,$new_height);
ImageCopyResized($new_image, $tmp_image,0,0,0,0, $new_width, $new_height, $width, $height);
//Grab new image
imagejpeg($new_image, $target_path);
$image_buffer = ob_get_contents();
ImageDestroy($new_image);
ImageDestroy($tmp_image);
echo " $file resized to $new_width x $new_height <br> \n";
echo str_pad('',4096)."\n";
ob_flush();
flush();
}
}
}
closedir($handle);
echo "Done.";
ob_end_flush();
}
?>