از این کد برای تغییر اندازه تصاویر استفاده کنید:
<?php
ob_start();
function calculate_width_height($width, $height,$width_needed, $height_needed)
{
if ($width <= $width_needed and $height <= $height_needed)
{
//Estimate if both Width and Height of the image are smaller then
//the given values for Width and Height
//if this is true dan keep the original size of the image
$l_new_width=$width;
$l_new_height=$height;
}
else
{
if ($height > $height_needed)
{
//If the value of the height of the image is greater then the given value for height
//then estimate the percentage of the given value for height in relation to
//the original height value of the image
//Use this percentage to calculate the new width value for the image
//in relation to original width value of the image
$l_percentage_height =$height_needed/($height/100);
$l_new_width=($width/100)*$l_percentage_height;
$l_new_height=$height_needed;
if ($l_new_width > $width_needed)
{
//After calculation the new width value can stil be greater then the needed width value
//do the same calculation as above but then for the width needed
$l_percentage_width =$width_needed/($width/100);
$l_new_height=($height/100)*$l_percentage_width;
$l_new_width=$width_needed;
}
}
else
{
//The height value of the image is not greater then the needed height value
//but original width value of the image is
//calculate the new values for width and height
$l_percentage_width =$width_needed/($width/100);
$l_new_height=($height/100)*$l_percentage_width;
$l_new_width=$width_needed;
if ($l_new_height > $height_needed)
{
$l_percentage_height =$height_needed/($height/100);
$l_new_width=($width/100)*$l_percentage_height;
$l_new_height=$height_needed;
}
}
}
$calculated_width_height[] = round($l_new_width);
$calculated_width_height[] = round($l_new_height);
return $calculated_width_height;
}
function resize($filename, $dest, $width, $height, $type=''){
if(@imagecreatefromgif($filename)){
$img=imagecreatefromgif($filename);
$type_r='gif';
}
elseif(@imagecreatefromjpeg($filename)){
$img=imagecreatefromjpeg($filename);
$type_r='jpg';
}
elseif(@imagecreatefrompng($filename)){
$img=imagecreatefrompng($filename);
$type_r='png';
}
elseif(@imagecreatefromwbmp($filename)){
$img=imagecreatefromwbmp($filename);
$type_r='bmp';
}
else{
return 'Cannot open file';
}
$type=($type=='')?$type_r:'';
$img_n= @ imagecreatetruecolor ($width, $height);
@ imagecopyresampled($img_n, $img, 0, 0, 0, 0, $width, $height, imagesx($img), imagesy($img));
if($type=='gif'){
imagegif($img_n, $dest);
}
elseif($type=='jpg'){
@ imagejpeg($img_n, $dest);
}
elseif($type=='png'){
@ imagepng($img_n, $dest);
}
elseif($type=='bmp'){
@ imagewbmp($img_n, $dest);
}
Return true;
}
function upload_file($root_dir,$file_name,$file_name_tmp,$lc_width,$lc_height)
{
$lc_max_filesize=2001000;
$filesize=filesize($file_name_tmp);
$sub_server=substr($_SERVER["HTTP_REFERER"],7,9);
$uploaddir = "/get_on_top/image_resize/uploads";
if (
!file_exists($HTTP_SERVER_VARS["DOCUMENT_ROOT"].$uploaddir) ||
2 != (fileperms($HTTP_SERVER_VARS["DOCUMENT_ROOT"].$uploaddir) & 2) ||
1 != (fileperms($HTTP_SERVER_VARS["DOCUMENT_ROOT"].$uploaddir) & 1)
)
{
$error="tets";
}
$fileext = substr($file_name, -4);
if (strtolower($fileext) != ".jpg" and strtolower($fileext) != ".gif")
{
print "<b>For security reasons only the uploading of .jpg and .gif files is allowed.</b><br>\n";
print "<a href=\"javascript:history.back();\">Click here to go back.</a><br>";
exit;
};
$loc = $uploaddir."/".$file_name;
$fullloc = $root_dir.$loc;
$upfile = $file_name_tmp;
if ($filesize>$lc_max_filesize)
{
$lc_message= "File is too big, may not be bigger then 2MB";
}
else
{
if(move_uploaded_file($upfile, $fullloc))
{
chmod($fullloc, 0644);
}
else
{
die("Error moving \"$upfile\" to \"$fullloc\".");
}
$test =filesize($fullloc);
}
list($original_width, $original_height, $type, $attr) = getimagesize($fullloc);
list($l_new_width,$l_new_heigth) = calculate_width_height($original_width, $original_height,$lc_width,$lc_height);
resize($fullloc, $root_dir.$uploaddir."/".$lc_width."_".$lc_height."_".$file_name, $l_new_width, $l_new_heigth);
$upload_info[] = $lc_message;
$upload_info[] = $original_width;
$upload_info[] = $original_height;
$upload_info[] = $l_new_width;
$upload_info[] = $l_new_heigth;
return $upload_info;
}
?>
<body>
<?php
$root_dir =$HTTP_SERVER_VARS["DOCUMENT_ROOT"];
if ($_POST["resize_submit"] == "resize")
{
$lc_height =$_POST["height"];
$lc_width =$_POST["width"];
$day = getdate();
$minutes = $day['minutes'];
$temp=gettimeofday();
$sec=(int)$temp["sec"];
if (!empty($_FILES["userfile"]["name"]))
{
$fileext = substr($_FILES["userfile"]["name"], -4);
$ffile_name="1_".$minutes."_".$sec.$fileext;
$tfile_name_tmp=$_FILES["userfile"]["tmp_name"];
list($lc_upload_message,$original_width,$original_height,$l_new_width,$l_new_height) = upload_file($root_dir,$ffile_name,$tfile_name_tmp,$lc_width,$lc_height);
if ($lc_upload_message!="")
{
echo "error_message".$lc_upload_message;
}
}
?>
<form ENCTYPE="multipart/form-data" action="resize_image.php" method="post">
<table>
<tr><td>height :</td><td><input type="TEXT" name="height" size="10" value="<?php echo $lc_height ; ?>"></td></tr>
<tr><td>width :</td><td><input type="TEXT" name="width" size="10" value="<?php echo $lc_width ; ?>"></td></tr>
<tr><td>image to upload :</td><td><INPUT NAME="userfile" TYPE="file"></td></tr>
<tr><td><input type="submit" name="resize_submit" value="resize"></td>
</form>
</table>
<table>
<tr>
<td><IMG border=0 src="uploads/<?php echo $ffile_name ; ?>" ></td>
<td valign=bottom><IMG border=0 src="uploads/<?php echo $lc_width.'_'.$lc_height.'_'.$ffile_name ; ?>" ></td>
</tr>
<tr>
<td><?php echo "org_height:".$original_height." org_width:".$original_width; ?></td>
<td><?php echo "new_height_".$l_new_height." new_width_".$l_new_width; ?></td>
</tr>
</table>
<?php
}
else
{
?>
<form ENCTYPE="multipart/form-data" action="resize_image.php" method="post">
<table>
<tr><td>height :</td><td><input type="TEXT" name="height" size="10" ></td></tr>
<tr><td>width :</td><td><input type="TEXT" name="width" size="10" ></td></tr>
<tr><td>image to upload :</td><td><INPUT NAME="userfile" TYPE="file"></td></tr>
<tr><td><input type="submit" name="resize_submit" value="resize"></td>
</form>
</table>
<?php
}
?>
</body>
</html>
<?php
ob_end_flush();
?>