直接可以拿来用的PHP常用功能代码片段(6~10)
文章来源：jquery教程?-?http://www.jq-school.com/show.aspx?id=324
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前面已经分享了PHP常用功能代码片段(1~5)，今天是第二篇，也就是第六到十这5个实现代码片段，希望可以帮到jquery学堂群里面的成员和广大对PHP开发的网友们提高开发效率，以下是第二篇文章。
6、PHP实现zip压缩解压通用函数
function ezip($zip, $hedef = ''){
$dirname=preg_replace('/.zip/', '', $zip);
$root = $_SERVER['DOCUMENT_ROOT'].'/zip/';
// echo $root. $zip;
$zip = zip_open($root . $zip);
// var_dump($zip);
@mkdir($root . $hedef . $dirname.'/'.$zip_dosya);
while($zip_icerik = zip_read($zip)){
$zip_dosya = zip_entry_name($zip_icerik);
if(strpos($zip_dosya, '.')){
$hedef_yol = $root . $hedef . $dirname.'/'.$zip_dosya;
@touch($hedef_yol);
// echo $hedef_yol;
$yeni_dosya = @fopen($hedef_yol, 'w+');
@fwrite($yeni_dosya, zip_entry_read($zip_icerik));
@fclose($yeni_dosya);
// $yeni_dosya;
}else{
@mkdir($root . $hedef . $dirname.'/'.$zip_dosya);
// echo $root . $hedef . 'x/'.$zip_dosya;
};
};
}
// ezip('yuol.zip','./tr/');
function zip($path) {
$path=preg_replace('/\/$/', '', $path);
preg_match('/\/([\d\D][^\/]*)$/', $path, $matches, PREG_OFFSET_CAPTURE);
$filename=$matches[1][0].".zip";
// var_dump($filename);
// set_time_limit(0);
$zip = new ZipArchive();
$zip->open($filename,ZIPARCHIVE::OVERWRITE);//return ;
// var_dump($path);
if (is_file($path)) {
$path=preg_replace('/\/\//', '/', $path);
$base_dir=preg_replace('/\/[\d\D][^\/]*$/', '/', $path);
$base_dir=addcslashes($base_dir, '/:');
$localname=preg_replace('/'.$base_dir.'/', '', $path);
// var_dump($localname);
$zip->addFile($path,$localname);
// var_dump($path);
$zip->close();
return;
}elseif (is_dir($path)) {
$path=preg_replace('/\/[\d\D][^\/]*$/', '', $path);
$base_dir=$path.'/';//基目录
$base_dir=addcslashes($base_dir, '/:');
// var_dump($base_dir);
}
$path=preg_replace('/\/\//', '/', $path);
// var_dump($path);
function addItem($path,&$zip,&$base_dir){
// var_dump($path);
$handle = opendir($path);
// var_dump($path);
while (false !== ($file = readdir($handle))) {
if (($file!='.')&&($file!='..')){
// var_dump($file);
$ipath=$path.'/'.$file;
if (is_file($ipath)){//条目是文件
$localname=preg_replace('/'.$base_dir.'/', '', $ipath);
var_dump($localname);
$zip->addFile($ipath,$localname);
// var_dump($r);
} else if (is_dir($ipath)){
addItem($ipath,$zip,$base_dir);
$localname=preg_replace('/'.$base_dir.'/', '', $ipath);
var_dump($localname);
$zip->addEmptyDir($localname);
}
// var_dump($path);
}
}
}
// var_dump($base_dir);
addItem($path,$zip,$base_dir);
$zip->close();
}
//调用方法
zip('解压的目录');
7、php实用获取远程图片的通用方法
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function auto_save_image($body){
$img_array = explode('&',$body);
/*$img_array = array();
preg_match_all("/(src)=[\"|\'| ]{0,}(http:\/\/(.*)\.(gif|jpg|jpeg|bmp|png))[\"|\'| ]{0,}/isU", $body, $img_array);
$img_array = array_unique($img_array[2]);*/ //也可以自动匹配
set_time_limit(0);
$imgPath = "uploads/allimg/".date("Ymd")."/";
$milliSecond = strftime("%H%M%S",time());
if(!is_dir($imgPath)) @mkdir($imgPath,0777);
foreach($img_array as $key =>$value)
{
$value = trim($value);
$get_file = @file_get_contents($value);
$rndFileName = $imgPath."/".$milliSecond.$key.".".substr($value,-3,3);
if($get_file)
{
$fp = @fopen($rndFileName,"w");
@fwrite($fp,$get_file);
@fclose($fp);
}
$body = @ereg_replace($value, $rndFileName, $body);
}
return $body;
}
8、PHP实现简单的文件下载通用方法
function download_file($file){
if(is_file($file)){
$length = filesize($file);
$type = mime_content_type($file);
$showname = ltrim(strrchr($file,'/'),'/');
header("Content-Description: File Transfer");
header('Content-type: ' . $type);
header('Content-Length:' . $length);
if (preg_match('/MSIE/', $_SERVER['HTTP_USER_AGENT'])) { //for IE
header('Content-Disposition: attachment; filename="' . rawurlencode($showname) . '"');
} else {
header('Content-Disposition: attachment; filename="' . $showname . '"');
}
readfile($file);
exit;
} else {
exit('文件已被删除！');
}
}
9、PHP实现导出Excel文件通用方法
/**
* 导出数据为excel表格
*@param $data 一个二维数组,结构如同从数据库查出来的数组
*@param $title excel的第一行标题,一个数组,如果为空则没有标题
*@param $filename 下载的文件名
*@examlpe
$stu = M ('User');
$arr = $stu -> select();
exportexcel($arr,array('id','账户','密码','昵称'),'文件名!');
*/
function exportexcel($data=array(),$title=array(),$filename='report'){
header("Content-type:application/octet-stream");
header("Accept-Ranges:bytes");
header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:attachment;filename=".$filename.".xls");
header("Pragma: no-cache");
header("Expires: 0");
//导出xls 开始
if (!empty($title)){
foreach ($title as $k => $v) {
$title[$k]=iconv("UTF-8", "GB2312",$v);
}
$title= implode("\t", $title);
echo "$title\n";
}
if (!empty($data)){
foreach($data as $key=>$val){
foreach ($val as $ck => $cv) {
$data[$key][$ck]=iconv("UTF-8", "GB2312", $cv);
}
$data[$key]=implode("\t", $data[$key]);
}
echo implode("\n",$data);
}
}
10、PHP实现如何清除TP的文件缓存
public function cache_clear() {
$this->deldir(TEMP_PATH);
}
function deldir($dir) {
$dh = opendir($dir);
while ($file = readdir($dh)) {
if ($file != "." && $file != "..") {
$fullpath = $dir . "/" . $file;
if (!is_dir($fullpath)) {
unlink($fullpath);
} else {
deldir($fullpath);
}
}
}
}
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