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12月 31st, 1969 作者 redhairboy
本文件可以用于自动创建目录下所有JPG图片的缩略图，放到图片目录下运行即可。
缺点：长宽不一的图片会被拉伸变形，不能智能裁切，需要智能裁切的，请自行研究。
<?php
$config = array();
$config['path'] = “./“;
$config['t_width'] = 120;
$config['t_height'] = 98;
$config['ignore'] = array(“”,“.“,“..“);
$config['prefix'] = “thumb_“;
$done = 0;
define(“IMAGE_JPG“, 2);
define(“ENDL“, “\n“);
if($handle = opendir($config['path'])) {
while(false !== ($file = readdir($handle))) {
if(!array_search($file,$config['ignore'])) {
list($im_width, $im_height, $type) = getimagesize($file);
if($type != IMAGE_JPG) {
continue;
}
$op .= “found -> <a href=’{$file}‘>$file</a>“ . ENDL;
$im = @imagecreatefromjpeg($file);
if(!$im) {
$op .= “fail -> couldn’t create sour image pointer.“ . ENDL;
continue;
}
if(file_exists($config['prefix'] . $file) || substr($file, 0, strlen($config['prefix'])) == $config['prefix']) {
$op .= “note -> this file has already got a thumbnail.“ . ENDL;
continue;
}
$to = imagecreatetruecolor($config['t_width'],$config['t_height']);
if(!$to) {
$op .= “fail -> couldn’t create dest image pointer.“ . ENDL;
continue;
}
if(!imagecopyresampled($to, $im, 0, 0, 0, 0, $config['t_width'], $config['t_height'], $im_width, $im_height)) {
$op .= “fail -> couldn’t create thumbnail. php fail.“ . ENDL;
continue;
}
//保存文件
imagejpeg($to, $config['prefix'] . $file);
$op .= “done -> created thumb: <a href=’{$config['prefix']}{$file}’>{$config['prefix']}{$file}</a>“ . ENDL;
$done++;
}
}
}
closedir($handle);
$op .= “fin -> {$done} file(s) written“ . ENDL;
echo “<pre>“;
echo $op;
echo “</pre>“;
exit;
?>
$config = array();
$config['path'] = “./“;
$config['t_width'] = 120;
$config['t_height'] = 98;
$config['ignore'] = array(“”,“.“,“..“);
$config['prefix'] = “thumb_“;
$done = 0;
define(“IMAGE_JPG“, 2);
define(“ENDL“, “\n“);
if($handle = opendir($config['path'])) {
while(false !== ($file = readdir($handle))) {
if(!array_search($file,$config['ignore'])) {
list($im_width, $im_height, $type) = getimagesize($file);
if($type != IMAGE_JPG) {
continue;
}
$op .= “found -> <a href=’{$file}‘>$file</a>“ . ENDL;
$im = @imagecreatefromjpeg($file);
if(!$im) {
$op .= “fail -> couldn’t create sour image pointer.“ . ENDL;
continue;
}
if(file_exists($config['prefix'] . $file) || substr($file, 0, strlen($config['prefix'])) == $config['prefix']) {
$op .= “note -> this file has already got a thumbnail.“ . ENDL;
continue;
}
$to = imagecreatetruecolor($config['t_width'],$config['t_height']);
if(!$to) {
$op .= “fail -> couldn’t create dest image pointer.“ . ENDL;
continue;
}
if(!imagecopyresampled($to, $im, 0, 0, 0, 0, $config['t_width'], $config['t_height'], $im_width, $im_height)) {
$op .= “fail -> couldn’t create thumbnail. php fail.“ . ENDL;
continue;
}
//保存文件
imagejpeg($to, $config['prefix'] . $file);
$op .= “done -> created thumb: <a href=’{$config['prefix']}{$file}’>{$config['prefix']}{$file}</a>“ . ENDL;
$done++;
}
}
}
closedir($handle);
$op .= “fin -> {$done} file(s) written“ . ENDL;
echo “<pre>“;
echo $op;
echo “</pre>“;
exit;
?>
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12月 31st, 1969 作者 redhairboy
今天我找了喜悦国际村里所有的分页函数和类,没有一个简单好用点的.
有位大虾发的那个仿GOOGLE的我拿来试了,页码老是少1,调了半天不好用,还是自己写吧.
高手有兴趣可以帮忙改进下.方法一看就比较笨的 
不过尽管方法笨,但用起来自我感觉还是挺好的.
这个函数只需要2个参数 当前页码和总页数,$site是路径,文件名可以按自己的需要修改
这个函数不能传递其他参数,如果要传递其他参数,在函数里自己加一个参数就行了
<?php
//计数
$sql = “Select count(*) FROM `andycms_title`;”;
$numrs = mysql_query($sql) or die(mysql_error());
$numrow = mysql_fetch_row($numrs);
$num = $numrow[0]; //总记录
$total = ceil($num / $perpage); //总页数
//当前页码
if(!isset($_GET['page']) || preg_match(‘~[^0-9]+~’,($_GET['page'])) || $_GET['page'] <= 0 || $_GET['page'] > $total) $page = 1;
else $page = $_GET['page'];
$startnum = ($page-1) * $perpage; //记录集开始数
?>
<?php
// Andy分页函数
function fenye ($p,$total)
{
global $site;
$prevs = $p - 10; if ( $prevs <= 0) { $prevs = 1; }
$prev = $prevs - 1; if ( $prev <= 0) {$prev = 1;}
$nexts = $p + 9; if ( $nexts > $total) { $nexts = $total; }
$next = $nexts + 1; if ( $next > $total) {$next = $total;}
$pagenavi = “<a href=\”$site/?page=1\”>首页</a> “;
$pagenavi.= “<a href=\”$site/?page=$prev\”>上页</a> “;
for ( $i = $prevs; $i <= $p-1; $i++ ) {
$pagenavi.= “<a href=\”$site/?page=$i\”>$i</a> “;
}
$pagenavi.= “<strong>$p</strong> “;
for ( $i = $p+1; $i <= $nexts; $i++ ) {
$pagenavi.= “<a href=\”$site/?page=$i\”>$i</a> “;
}
$pagenavi.= “<a href=\”$site/?page=$next\”>下页</a> “;
$pagenavi.= “<a href=\”$site/?page=$total\”>尾页</a> “;
return $pagenavi;
}
?>
效果:
page=1
首页 上页 1 2 3 4 5 6 7 8 9 10 下页 尾页
page=10
首页 上页 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 下页 尾页
page=20
首页 上页 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 下页 尾页
另外,可以用一下这个函数,Discuz类型的
<?php
// 分页函数
function multi($num, $perpage, $curr_page, $mpurl) {
$multipage = ”;
if($num > $perpage) {
$page = 10;
$offset = 2;
$pages = ceil($num / $perpage);
$from = $curr_page - $offset;
$to = $curr_page + $page - $offset - 1;
if($page > $pages) {
$from = 1;
$to = $pages;
} else {
if($from < 1) {
$to = $curr_page + 1 - $from;
$from = 1;
if(($to - $from) < $page && ($to - $from) < $pages) {
$to = $page;
}
} elseif($to > $pages) {
$from = $curr_page - $pages + $to;
$to = $pages;
if(($to - $from) < $page && ($to - $from) < $pages) {
$from = $pages - $page + 1;
}
}
}
$multipage .= “<a href=\”$mpurl?page=1\”>首页</a> “;
for($i = $from; $i <= $to; $i++) {
if($i != $curr_page) {
$multipage .= “<a href=\”$mpurl?page=$i\”>$i</a> “;
} else {
$multipage .= ‘<strong>’.$i.‘</strong> ‘;
}
}
$multipage .= $pages > $page ? ” … <a href=\”$mpurl?page=$pages\”>尾页</a>” : ” <a href=\”$mpurl&page=$pages\”>首页</a>”;
}
return $multipage;
}
?>
效果:
page=1
首页 1 2 3 4 5 6 7 8 9 10 … 尾页
page=10
首页 8 9 10 11 12 13 14 15 16 17 … 尾页
page=20
首页 18 19 20 21 22 23 24 25 26 27 … 尾页
—–
Filed under: PHP |
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Posted on
12月 31st, 1969 作者 redhairboy
mt_rand() 比rand() 快四倍
很多老的 libc 的随机数发生器具有一些不确定和未知的特性而且很慢。PHP 的 rand() 函数默认使用 libc
随机数发生器。mt_rand() 函数是非正式用来替换它的。该函数用了 Mersenne Twister
中已知的特性作为随机数发生器，mt_rand() 可以产生随机数值的平均速度比 libc 提供的 rand() 快四倍。 —–
Filed under: PHP |
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12月 31st, 1969 作者 redhairboy
以下是手册中关于PHP变量的指针的例子,理解一下.
注意其中几行加粗的,变量的变化.
In
response to the example by mdiricks. Extending the example given by
mdiricks, the following code provides an explains the concept of
re-referencing that is involved in making a call to function foo with
the prototype foo(& var):
<!– C re-referenced –>
<?$a = ‘eh’;
$b = & $a; // $b == ‘eh’
$c = & $b; // $c == ‘eh’
$d = ‘meh’;echo “\$a = $a\n”; //$a = eh
echo “\$b = $b\n”; //$b = eh
echo “\$c = $c\n”; //$c = eh
echo “\$d = $d\n”; //$d = meh$c = & $d ;// $c == ‘meh’
echo “\n”;echo “\$a = $a\n”; //$a = eh
echo “\$b = $b\n”; //$b = eh
echo “\$c = $c\n”; //$c = meh
echo “\$d = $d\n”; //$d = meh?>
<!– Value of c changed –>
<?$a = ‘eh’;
$b = & $a;// $b == ‘eh’
$c = & $b;// $c == ‘eh’
$d = ‘meh’;echo “\$a = $a\n”; //$a = eh
echo “\$b = $b\n”; //$b = eh
echo “\$c = $c\n”; //$c = eh
echo “\$d = $d\n”; //$d = meh$c = ‘meh’ ;// $c == ‘meh’. And also, $a = $b == ‘meh’
echo “\n”;echo “\$a = $a\n”; //$a = meh
echo “\$b = $b\n”; //$b = meh
echo “\$c = $c\n”; //$c = meh
echo “\$d = $d\n”; //$d = meh?>
This results in the following o/p:
<!– C re-referenced –>
$a = eh
$b = eh
$c = eh
$d = meh$a = eh
$b = eh
$c = meh
$d = meh<!– Value of c changed –>
$a = eh
$b = eh
$c = eh
$d = meh$a = meh
$b = meh
$c = meh
$d = meh