PHP 小代码

//获取网上的一个文件
function getUrlImage($url, $file = '', $maxExe = 0, $safe = false){
$urlExt = explode('.', $url);
$fileExt = array('txt','jpg','gif','png');
if(!in_array(end($urlExt), $fileExt, true)) return false;
$file = ($file)? $file.$urlExt : basename($url);
$file = rand(1,1000).$file;
ob_start(); //开启输出缓冲
set_time_limit($maxExe); //开启最大运行时间
readfile($url);//读入一个文件并写入到输出缓冲
$data = ob_get_contents();
ob_end_clean();
file_put_contents($file,$data);
if($safe && is_executable($file)){//为安全起见,判定一下文件是否可执行
unlink($file);
return false;
}
return $file;
}

getUrlImage('http://www.test.com/3675.jpg','newName');

//批量生成cookie
function mySetCookie($data, $name){
if(empty($data) || empty($name))return;
$args = func_get_args();
$time = empty($args[2])? time() + 3600 : time() + $args[2];
$path = empty($args[3])? '' : $args[3];
$domain = empty($args[4])? '' : $args[4];
$secure = empty($args[5])? '' : $args[5];
if(is_array($data)){
foreach($data as $key => $val){
$full = "{$name}[$key]";
setcookie($full, $val, $time, $path, $domain, $secure);
}
}else{
setcookie($name, $data, $time, $path, $domain, $secure);
}

}

$data = array('name' => '李四', 'age' => 15);
mySetCookie($data,'userInfo');
print_r($_COOKIE);

//冒泡排序
function arrSort(&$arr, $asc = ''){
$times = count($arr) - 1;
for($i = 0; $i < $times; $i++){
for($j = 0; $j < $times - $i; $j++){
if($arr[$j] > $arr[$j + 1]){
$temp = $arr[$j];
$arr[$j] = $arr[$j + 1];
$arr[$j + 1] = $temp;
}
}
}
if('' != $asc) $arr = array_reverse($arr, false);//反转数组元素
}

//选择排序
function seleSort(&$arr){
$times = count($arr) - 1;
$jMax = count($arr);
for($i = 0; $i < $times; $i++){
$min = $arr[$i];
$minId = $i;
for($j = $i + 1; $j < $jMax; $j++){
if($min > $arr[$j]){
$min = $arr[$j];
$minId = $j;
}
}
$temp = $arr[$i];
$arr[$i] = $arr[$minId];
$arr[$minId] = $temp;
}
}

//插入排序
function inserSort(&$arr){
$times = count($arr);
for($i = 1; $i < $times; $i++){
$insert = $arr[$i];
$insertId = $i - 1;
while($insertId >= 0 && $insert < $arr[$insertId]){
$arr[$insertId + 1] = $arr[$insertId];
$insertId--;
}
$arr[$insertId + 1] = $insert;
}
}

//计算两个文件的相对路径。
function relative_dir($fileA, $fileB){//A相当于B，所在目录
$aPath = explode('/',dirname($fileA));
$bPath = explode('/',dirname($fileB));
$bLen = count($bPath);
$j = 1;
for($i = 1; $i < $bLen; $i++){
if(isset($bPath) && isset($aPath)){
if($aPath[$i] == $bPath[$i]){$j++;}//累计相同路径部分
if($aPath[$i] != $bPath[$i]){$path .= '../';}//不同的，则增加退回上级
}
}
$path .= implode('/',array_slice($aPath, $j)).'/'.basename($fileA);
return $path;
}

$a = 'a/b/c/test/5/8/aaa.php';
$b = 'a/b/c/check/1/2/3/4/bbb.php';
echo relative_dir($a,$b);

//以附件方式实现文件下载：
$file = 'e:/个人简历.doc';
$file = iconv('utf-8', 'gb2312',$file);
if(file_exists($file)){
$fname = basename($file);
$fsize = filesize($file);
header("Content-type:application/octet-stream");//二进制数据
header("Content-Disposition:attachment;filename={$fname}");//附件形式
header("Accept-ranges:bytes");
header("Accept-length:".$fsize);
readfile($file);
}else{
exit('flie not found!');
}

遍历一个目录，及其子目录：
function recurDir($pathName){
$result = array();
$temp = array();
if(!is_dir($pathName) || !is_readable($pathName)) return null;
$allFiles = scandir($pathName);
foreach($allFiles as $fileName){
if(in_array($fileName, array('.','..')))continue;
$fullName = $pathName . '/' . $fileName;
if(is_dir($fullName)){
$result[$fileName] = recurdir($fullName);
}else{
$temp[] = $fileName;
}
}
foreach($temp as $f){
$result[] = $f;
}
return $result;
}
$pathName = 'D:\AppServ\www\zbseoag\\';
print_r(recurDir($pathName));

//从URL中获取文件扩展名：
function getExt($url){
$arr = parse_url($url);//把URL解析成数组
$file = basename($arr['path']);
$ext = explode('.',$file);
return end($ext);
}

//PHP验证email格式
function checkEmail($email){
$pattern = "/([a-z0-9]*[-_/.]?[a-z0-9]+)*@([a-z0-9]*[-_]?[a-z0-9]+)+[/.][a-z]{2,3}([/.][a-z]{2})?/i";
return preg_match($pattern,$email);
}

//文件上传
<script>
function addUpload(){
document.getElementById("upfiles").innerHTML += '<li>文件：<input type="file" name="files[]" /></li>';
}
function resetUpload(){
document.getElementById("upfiles").innerHTML = '<li>文件：<input type="file" name="files[]" /></li>';
}
</script>
<form action="" method="post" enctype="multipart/form-data" >
<ul id="upfiles">
<li>文件：<input type="file" name="files[]" /></li>
</ul>
<input type="submit" value="提交" />
<input type="button" value="增加上传框" onClick="addUpload()" />
<input type="button" value="重设上传框" onClick="resetUpload()" />
</form>

$files = 'files';//files是$_FILES中的一个元素数组,并所上传文件信息进行了归类
$upDir = './upImg/';
$fTypes = 'jpg|gif|txt|chm';

//求今天是星期几：
$time = getdate();//获取当前时间戳中的时间信息
$weekday = array('星期天', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六');
$wday = $time['wday'];//当前是一个星期中的第几天
echo date("今天是：Y年m月d日H:i:s $weekday[$wday]");

//求下周一是几月几日：
$time = time();//当前时间戳
$weekday = date('w');//当天的数字星期
switch($weekday){
case 0: $nextMonday = $time+86400;break;//星期天则加一天
case 1: $nextMonday = $time+7*86400;break;//星期一,则加七天
case 2: $nextMonday = $time+6*86400;break;
case 3: $nextMonday = $time+5*86400;break;
case 4: $nextMonday = $time+4*86400;break;
case 5: $nextMonday = $time+3*86400;break;
case 6: $nextMonday = $time+2*86400;break;
}
echo date('Y-m-d',$nextMonday);

//逐行读取文件指定行数的内容：
function getRowData($file, $row = 0, mark = false){
$fhandle = fopen($file,'rb');
$row = ($row == 0)? filesize($file) : $row;
while($row >0 && !feof($fhandle)){
$data[] = (mark)? fgets($fhandle) : fgetss($fhandle);
$row--;
}
fclose($fhandle);
}

//读取文件指定字符长度
function getLetterData($file, $num = 0, mark = false){
$fhandle = fopen($file,'rb');
$row = ($num)? filesize($file) : $num;
$data = fread($fhandle, $num);
fclose($fhandle);
}
//删除目录中在数据库中没有记录的图片
public function delImg($data, $dir = '.'){
$files = scandir($dir);
$delFiles = array_diff($allFiles,$data);
foreach($delFiles as $name){
$file = rtrim($dir,'/').'/'.$name;
unlink($file);
echo $file.'<br/>';
}
}

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