Dynamic image resizing in PHP
Via Darren Hoyt we found a reference to TimThumb, a quick and fast PHP script for on-the-fly image resizing. Once the script is on the server, and named timthumb.php, you can use the following reference to launch it:
<img src="/scripts/timthumb.php?src=/images/whatever.jpg&h=150&w=150&zc=1" alt="" />
Here's the source code for timthumb.php:
// TimThumb script created by Tim McDaniels and Darren Hoyt with tweaks by Ben Gillbanks
// http://code.google.com/p/timthumb/
// MIT License: http://www.opensource.org/licenses/mit-license.php
/* Parameters allowed: */
// w: width
// h: height
// zc: zoom crop (0 or 1)
// q: quality (default is 75 and max is 100)
// HTML example: 
if( !isset( $_REQUEST[ "src" ] ) ) { die( "no image specified" ); }
// clean params before use
$src = preg_replace( "/^(\.+(\/|))+/", "", $_REQUEST['src'] );
$src = preg_replace( '/^(s?f|ht)tps?:\/\/[^\/]+/i', '', $src );
$new_width = preg_replace( "/[^0-9]/", "", $_REQUEST[ 'w' ] );
$new_height = preg_replace( "/[^0-9]/", "", $_REQUEST[ 'h' ] );
$zoom_crop = preg_replace( "/[^0-9]/", "", $_REQUEST[ 'zc' ] );
if( !isset( $_REQUEST['q'] ) ) { $quality = 80; } else { $quality = preg_replace("/[^0-9]/", "", $_REQUEST['q'] ); }
// set path to cache directory (default is ./cache)
// this can be changed to a different location
$cache_dir = './cache';
// get mime type of src
$mime_type = mime_type( $src );
// check to see if this image is in the cache already
check_cache( $cache_dir, $mime_type );
// make sure that the src is gif/jpg/png
if( !valid_src_mime_type( $mime_type ) ) {
$error = "Invalid src mime type: $mime_type";
die( $error );
}
// check to see if GD function exist
if(!function_exists('imagecreatetruecolor')) {
$error = "GD Library Error: imagecreatetruecolor does not exist";
die( $error );
}
// set document root
$doc_root = $_SERVER['DOCUMENT_ROOT'];
// get path to image on file system
$src = $doc_root . '/' . $src;
if(strlen($src) && file_exists( $src ) ) {
// open the existing image
$image = open_image($mime_type, $src);
if ($image === false) { die ('Unable to open image : ' . $src ); }
// Get original width and height
$width = imagesx($image);
$height = imagesy($image);
// generate new w/h if not provided
if($new_width && !$new_height) {
$new_height = $height * ($new_width/$width);
}
elseif($new_height && !$new_width) {
$new_width = $width * ($new_height/$height);
}
elseif(!$new_width && !$new_height) {
$new_width = $width;
$new_height = $height;
}
// create a new true color image
$canvas = imagecreatetruecolor($new_width, $new_height);
if( $zoom_crop ) {
$src_x = $src_y = 0;
$src_w = $width;
$src_h = $height;
$cmp_x = $width / $new_width;
$cmp_y = $height / $new_height;
// calculate x or y coordinate and width or height of source
if ( $cmp_x > $cmp_y ) {
$src_w = round( ( $width / $cmp_x * $cmp_y ) );
$src_x = round( ( $width - ( $width / $cmp_x * $cmp_y ) ) / 2 );
}
elseif ( $cmp_y > $cmp_x ) {
$src_h = round( ( $height / $cmp_y * $cmp_x ) );
$src_y = round( ( $height - ( $height / $cmp_y * $cmp_x ) ) / 2 );
}
imagecopyresampled( $canvas, $image, 0, 0, $src_x, $src_y, $new_width, $new_height, $src_w, $src_h );
}
else {
// copy and resize part of an image with resampling
imagecopyresampled( $canvas, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height );
}
// output image to browser based on mime type
show_image( $mime_type, $canvas, $quality, $cache_dir );
// remove image from memory
ImageDestroy( $canvas );
} else {
if( strlen( $src ) ) { echo $src . ' not found.'; } else { echo 'no source specified.'; }
}
function show_image ($mime_type, $image_resized, $quality, $cache_dir) {
// check to see if we can write to the cache directory
$is_writable = 0;
$cache_file_name = $cache_dir . '/' . get_cache_file();
if( touch( $cache_file_name ) ) {
// give 666 permissions so that the developer
// can overwrite web server user
chmod( $cache_file_name, 0666 );
$is_writable = 1;
}
else {
$cache_file_name = NULL;
header('Content-type: ' . $mime_type);
}
if(stristr( $mime_type, 'gif' ) ) {
imagegif( $image_resized, $cache_file_name );
}
elseif( stristr( $mime_type, 'jpeg' ) ) {
imagejpeg( $image_resized, $cache_file_name, $quality );
}
elseif( stristr( $mime_type, 'png' ) ) {
imagepng( $image_resized, $cache_file_name, ceil( $quality / 10 ) );
}
if( $is_writable ) { show_cache_file( $cache_dir, $mime_type ); }
exit;
}
function open_image ($mime_type, $src) {
if(stristr($mime_type, 'gif')) {
$image = imagecreatefromgif($src);
}
elseif(stristr($mime_type, 'jpeg')) {
$image = imagecreatefromjpeg($src);
}
elseif(stristr($mime_type, 'png')) {
$image = imagecreatefrompng($src);
}
return $image;
}
function mime_type ($file) {
$frags = split("\.", $file);
$ext = strtolower( $frags[ count( $frags ) - 1 ] );
$types = array(
'jpg' => 'image/jpeg',
'jpeg' => 'image/jpeg',
'png' => 'image/png',
'gif' => 'image/gif',
'bmp' => 'image/bmp',
'doc' => 'application/msword',
'xls' => 'application/msword',
'xml' => 'text/xml',
'html' => 'text/html'
);
$mime_type = $types[$ext];
if(!strlen($mime_type)) { $mime_type = 'unknown'; }
return($mime_type);
}
function valid_src_mime_type ( $mime_type ) {
if( preg_match( "/jpg|jpeg|gif|png/i", $mime_type ) ) { return 1; }
return 0;
}
function check_cache ( $cache_dir, $mime_type ) {
// make sure cache dir exists
if(!file_exists($cache_dir)) {
// give 777 permissions so that developer can overwrite
// files created by web server user
mkdir( $cache_dir );
chmod( $cache_dir, 0777 );
}
show_cache_file( $cache_dir, $mime_type );
}
function show_cache_file ( $cache_dir, $mime_type ) {
$cache_file = get_cache_file();
if( file_exists( $cache_dir . '/' . $cache_file ) ) {
// check for updates
$if_modified_since = preg_replace('/;.*$/', '', $_SERVER[ "HTTP_IF_MODIFIED_SINCE" ]);
$gmdate_mod = gmdate('D, d M Y H:i:s', filemtime( $cache_dir . '/' . $cache_file ) );
if(strstr($gmdate_mod, 'GMT')) {
$gmdate_mod .= " GMT";
}
//error_log("TimThumb: $gmdate_mod == $if_modified_since");
if ( $if_modified_since == $gmdate_mod ) {
header( "HTTP/1.1 304 Not Modified" );
exit;
}
// send headers then display image
header( "Content-Type: " . $mime_type );
header( "Last-Modified: " . gmdate('D, d M Y H:i:s', filemtime( $cache_dir . '/' . $cache_file ) . " GMT" ) );
header( "Content-Length: " . filesize( $cache_dir . '/' . $cache_file ) );
header( "Cache-Control: max-age=9999, must-revalidate" );
header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + 9999 ) . "GMT" );
readfile( $cache_dir . '/' . $cache_file );
exit;
}
}
function get_cache_file () {
$request_params = $_REQUEST;
$cachename = $_REQUEST['src'] . $_REQUEST['w'] . $_REQUEST['h'] . $_REQUEST['zc'] . $_REQUEST['q'];
$cache_file = md5( $cachename );
return $cache_file;
}
Topics: PHP | 1 Comment »
Spiraling quine in Perl
#!/usr/bin/perl
$_='
$q ="\ 47"; wh
ile ($ ;=
$z += .5 ){
%c= $r=0;$/ ="";whi le(2
0+ $z>($;+=.05)){$c{int$ _+ 2
6+ 2*($ r+= .0 2) *
s in$ ;}{1 -$_
+1 0+ int $r*c o s
$ ;} =1for(0. .1) }$
t =r ever se;$ /. =`
c le ar `. " #!
/ usr /bi n/ pe
rl \n\ $_ =$q \n" ;
fo r$y (1..20){$c{$_} {
$ y }? $ /.=chop$t :
($/ . =" \4
0") for(0. .53) ;
$/. ="\n"}pri nt"$/$ q;
s; ". chr(9 2)."s;;g;eval\n "}
';s;\s;;g;eval
Courtesy of PerlMonks
Topics: perl, quine | No Comments »
PHP imagefilter without GD
This code is intended for imagefilter() to work on the servers which don't have PHP GD extension.
//include this file whenever you have to use imageconvolution…
//you can use in your project, but keep the comment below
//great for any image manipulation library
//Made by Chao Xu(Mgccl) 3/1/07
//www.webdevlogs.com
//V 1.0
if(!function_exists(‘imagefilter’)){
function imagefilter($source, $var, $arg1 = null, $arg2 = null, $arg3 = null){
#define(’IMAGE_FILTER_NEGATE’,0);
#define(’IMAGE_FILTER_GRAYSCALE’,0);
#define(’IMAGE_FILTER_BRIGHTNESS’,2);
#define(’IMAGE_FILTER_CONTRAST’,3);
#define(’IMAGE_FILTER_COLORIZE’,4);
#define(’IMAGE_FILTER_EDGEDETECT’,5);
#define(’IMAGE_FILTER_EMBOSS’,6);
#define(’IMAGE_FILTER_GAUSSIAN_BLUR’,7);
#define(’IMAGE_FILTER_SELECTIVE_BLUR’,8);
#define(’IMAGE_FILTER_MEAN_REMOVAL’,9);
#define(’IMAGE_FILTER_SMOOTH’,10);
$max_y = imagesy($source);
$max_x = imagesx($source);
switch ($var){
case 0:
$y = 0;
while($y<$max_y) {
$x = 0;
while($x<$max_x){
$rgb = imagecolorat($source,$x,$y);
$r = 255 - (($rgb >> 16) & 0xFF);
$g = 255 - (($rgb >> 8) & 0xFF);
$b = 255 - ($rgb & 0xFF);
$a = $rgb >> 24;
$new_pxl = imagecolorallocatealpha($source, $r, $g, $b, $a);
if ($new_pxl == false){
$new_pxl = imagecolorclosestalpha($source, $r, $g, $b, $a);
}
imagesetpixel($source,$x,$y,$new_pxl);
++$x;
}
++$y;
}
return true;
break;
case 1:
$y = 0;
while($y<$max_y) {
$x = 0;
while($x<$max_x){
$rgb = imagecolorat($source,$x,$y);
$a = $rgb >> 24;
$r = ((($rgb >> 16) & 0xFF)*0.299)+((($rgb >> 8) & 0xFF)*0.587)+(($rgb & 0xFF)*0.114);
$new_pxl = imagecolorallocatealpha($source, $r, $r, $r, $a);
if ($new_pxl == false){
$new_pxl = imagecolorclosestalpha($source, $r, $r, $r, $a);
}
imagesetpixel($source,$x,$y,$new_pxl);
++$x;
}
++$y;
}
return true;
break;
case 2:
$y = 0;
while($y<$max_y) {
$x = 0;
while($x<$max_x){
$rgb = imagecolorat($source,$x,$y);
$r = (($rgb >> 16) & 0xFF) + $arg1;
$g = (($rgb >> 8) & 0xFF) + $arg1;
$b = ($rgb & 0xFF) + $arg1;
$a = $rgb >> 24;
$r = ($r > 255)? 255 : (($r < 0)? 0:$r);
$g = ($g > 255)? 255 : (($g < 0)? 0:$g);
$b = ($b > 255)? 255 : (($b < 0)? 0:$b);
$new_pxl = imagecolorallocatealpha($source, $r, $g, $b, $a);
if ($new_pxl == false){
$new_pxl = imagecolorclosestalpha($source, $r, $g, $b, $a);
}
imagesetpixel($source,$x,$y,$new_pxl);
++$x;
}
++$y;
}
return true;
break;
case 3:
$contrast = pow((100-$arg1)/100,2);
$y = 0;
while($y<$max_y) {
$x = 0;
while($x<$max_x){
$rgb = imagecolorat($source,$x,$y);
$a = $rgb >> 24;
$r = (((((($rgb >> 16) & 0xFF)/255)-0.5)*$contrast)+0.5)*255;
$g = (((((($rgb >> 8) & 0xFF)/255)-0.5)*$contrast)+0.5)*255;
$b = ((((($rgb & 0xFF)/255)-0.5)*$contrast)+0.5)*255;
$r = ($r > 255)? 255 : (($r < 0)? 0:$r);
$g = ($g > 255)? 255 : (($g < 0)? 0:$g);
$b = ($b > 255)? 255 : (($b < 0)? 0:$b);
$new_pxl = imagecolorallocatealpha($source, $r, $g, $b, $a);
if ($new_pxl == false){
$new_pxl = imagecolorclosestalpha($source, $r, $g, $b, $a);
}
imagesetpixel($source,$x,$y,$new_pxl);
++$x;
}
++$y;
}
return true;
break;
case 4:
$x = 0;
while($x<$max_x){
$y = 0;
while($y<$max_y){
$rgb = imagecolorat($source, $x, $y);
$r = (($rgb >> 16) & 0xFF) + $arg1;
$g = (($rgb >> 8) & 0xFF) + $arg2;
$b = ($rgb & 0xFF) + $arg3;
$a = $rgb >> 24;
$r = ($r > 255)? 255 : (($r < 0)? 0:$r);
$g = ($g > 255)? 255 : (($g < 0)? 0:$g);
$b = ($b > 255)? 255 : (($b < 0)? 0:$b);
$new_pxl = imagecolorallocatealpha($source, $r, $g, $b, $a);
if ($new_pxl == false){
$new_pxl = imagecolorclosestalpha($source, $r, $g, $b, $a);
}
imagesetpixel($source,$x,$y,$new_pxl);
++$y;
}
++$x;
}
return true;
break;
case 5:
return imageconvolution($source, array(array(-1,0,-1), array(0,4,0), array(-1,0,-1)), 1, 127);
break;
case 6:
return imageconvolution($source, array(array(1.5, 0, 0), array(0, 0, 0), array(0, 0, -1.5)), 1, 127);
break;
case 7:
return imageconvolution($source, array(array(1, 2, 1), array(2, 4, 2), array(1, 2, 1)), 16, 0);
break;
case 8:
for($y = 0; $y<$max_y; $y++) {
for ($x = 0; $x<$max_x; $x++) {
$flt_r_sum = $flt_g_sum = $flt_b_sum = 0;
$cpxl = imagecolorat($source, $x, $y);
for ($j=0; $j<3; $j++) {
for ($i=0; $i<3; $i++) {
if (($j == 1) && ($i == 1)) {
$flt_r[1][1] = $flt_g[1][1] = $flt_b[1][1] = 0.5;
} else {
$pxl = imagecolorat($source, $x-(3>>1)+$i, $y-(3>>1)+$j);
$new_a = $pxl >> 24;
//$r = (($pxl >> 16) & 0xFF);
//$g = (($pxl >> 8) & 0xFF);
//$b = ($pxl & 0xFF);
$new_r = abs((($cpxl >> 16) & 0xFF) - (($pxl >> 16) & 0xFF));
if ($new_r != 0) {
$flt_r[$j][$i] = 1/$new_r;
} else {
$flt_r[$j][$i] = 1;
}
$new_g = abs((($cpxl >> 8) & 0xFF) - (($pxl >> 8) & 0xFF));
if ($new_g != 0) {
$flt_g[$j][$i] = 1/$new_g;
} else {
$flt_g[$j][$i] = 1;
}
$new_b = abs(($cpxl & 0xFF) - ($pxl & 0xFF));
if ($new_b != 0) {
$flt_b[$j][$i] = 1/$new_b;
} else {
$flt_b[$j][$i] = 1;
}
}
$flt_r_sum += $flt_r[$j][$i];
$flt_g_sum += $flt_g[$j][$i];
$flt_b_sum += $flt_b[$j][$i];
}
}
for ($j=0; $j<3; $j++) {
for ($i=0; $i<3; $i++) {
if ($flt_r_sum != 0) {
$flt_r[$j][$i] /= $flt_r_sum;
}
if ($flt_g_sum != 0) {
$flt_g[$j][$i] /= $flt_g_sum;
}
if ($flt_b_sum != 0) {
$flt_b[$j][$i] /= $flt_b_sum;
}
}
}
$new_r = $new_g = $new_b = 0;
for ($j=0; $j<3; $j++) {
for ($i=0; $i<3; $i++) {
$pxl = imagecolorat($source, $x-(3>>1)+$i, $y-(3>>1)+$j);
$new_r += (($pxl >> 16) & 0xFF) * $flt_r[$j][$i];
$new_g += (($pxl >> 8) & 0xFF) * $flt_g[$j][$i];
$new_b += ($pxl & 0xFF) * $flt_b[$j][$i];
}
}
$new_r = ($new_r > 255)? 255 : (($new_r < 0)? 0:$new_r);
$new_g = ($new_g > 255)? 255 : (($new_g < 0)? 0:$new_g);
$new_b = ($new_b > 255)? 255 : (($new_b < 0)? 0:$new_b);
$new_pxl = ImageColorAllocateAlpha($source, (int)$new_r, (int)$new_g, (int)$new_b, $new_a);
if ($new_pxl == false) {
$new_pxl = ImageColorClosestAlpha($source, (int)$new_r, (int)$new_g, (int)$new_b, $new_a);
}
imagesetpixel($source,$x,$y,$new_pxl);
}
}
return true;
break;
case 9:
return imageconvolution($source, array(array(-1,-1,-1),array(-1,9,-1),array(-1,-1,-1)), 1, 0);
break;
case 10:
return imageconvolution($source, array(array(1,1,1),array(1,$arg1,1),array(1,1,1)), $arg1+8, 0);
break;
}
}
}
?>
Topics: PHP | No Comments »
Recursive quicksort
#include
#include
void qsort(int a[],int,int);
void partition(int a[],int,int,int *);
void print(int *,int);
void swap(int *,int *);
void main()
{
int a[30],i,n;
flushall();
clrscr();
printf("
enter how many data u want :");
scanf("%d",&n);
printf("
enter the data :");
for(i=0;i
printf("
%d .",i);
scanf("%d",&a[i]);
}
qsort(a,0,n-1);
printf("
SORTED DATA:
");
print(a,n-1);
getch();
}
void qsort(int a[],int lb,int ub)
{
int j;
if(ub>lb)
{
partition(a,lb,ub,&j);
qsort(a,lb,j-2);
qsort(a,j+2,ub);
}
}
void partition(int a[],int lb,int ub,int *j)
{
int mid=(lb+ub)/2,temp,up,down,pivot;
pivot=a[mid];
up=ub;
down=lb;
while(down
while( a[down] <= pivot && down <= ub )
{
down++;
if(a[down]
swap(&a[down],&a[down-1]);
}
while(a[up]>pivot)
{
up--;
if(a[up]>a[up+1]&&up
}
if(down
swap(&a[down],&a[up]);
if(a[down]
swap(&a[down],&a[down-1]);
if(a[up]>a[up+1]&&up
}
}
for(int i=0;i
swap(&a[i],&a[i+1]);
*j=up;
}
void print(int a[],int n)
{
for(int i=0;i<=n;i++)
printf("
%d . %d",i,a[i]);
}
void swap(int *p,int *q)
{
int t;
t=*p;
*p=*q;
*q=t;
}
Topics: C++ | No Comments »
Nice CSS tab menu with PHP
if (isset($_REQUEST['tab'])) {
$tab = $_REQUEST['tab'];
} else {
$tab = 0;
}
?>
switch ($tab) {
case 1: //Manage User Tab1
?>
break;
case 2: // Manage User Tab2
?>
break;
default: // Manage User TabDefault
?>
break;
}
?>
Topics: PHP, apache, css | No Comments »
A vertical menu done in CSS
body{
background: #fff;
line-height: 1.1;
color: #666;
font: small Verdana, Geneva, Arial, Helvetica, sans-serif;
}
#Navigator {
width: auto;
background: #fcfcff ;
padding: 0 6px .5em 12px;
overflow: visible;
min-width:750px;
clear: both!important;
top:1em!important;
margin-bottom:1em!important;
}
.fixclear {
display:block;
position:relative
}
#NavData {
float:left;
clear: left;
width:225px;
margin:0;
}
div.NavMain {
background:#FcFcFf;
position:relative;
margin-bottom:1em;
width:auto!important;
width:100%;
border:1px solid #CAD6E8 ;
padding:1em 0 1.5em 0;
}
h2, h3{
color:#036;
background: transparent;
font-family: 'Trebuchet MS', Arial, Helvetica, sans-serif
}
h4 {
font: bold 100% Verdana, Arial, Helvetica, sans-serif;
}
a:link{
color: #06c;
background: transparent;
}
a:visited{
color:#4B5970;
background: transparent;
}
a:hover{
color: #f60;
background: transparent;
}
#Navigator div h3 {
font: normal .9em Verdana, Arial, Helvetica, sans-serif;
height:1em;
padding:2px 1.5em 4px .5em;
clear: right;
color:#99ACCA ;
background:transparent url(bulletr.gif) right center no-repeat;
margin:0;
position:absolute;
right:-1px;
top:-.8em;
border:0 none;
}
div.NavMain * {
margin:4px 6px 6px 10px;
}
div.NavMain * * {
margin:0;
}
div.NavMain h4 {
color: #E14900;
}
div.NavMain ul, div.NavMain ol{
margin: 5px 0 10px 5px;
padding:0 0 0 5px;
font-size:77%;
font-weight:bold;
}
div.NavMain li {
margin: 0 5px 5px 18px;
padding:0
}
div.NavMain ul li {
list-style-image: url(Bullet.gif);
}
div.NavMain ul li:hover {
list-style-image:url(Bullet.gif)
}
div.NavMain p {
font-size:77% ;
margin-bottom:10px
}
Topics: css | No Comments »