PHP文件 Zip 压缩与zip解压

/* creates a compressed zip file */
function create_zip($files = array(),$destination = '',$overwrite = false) {
//if the zip file already exists and overwrite is false, return false
if(file_exists($destination) && !$overwrite) { return false; }
//vars
$valid_files = array();
//if files were passed in...
if(is_array($files)) {
//cycle through each file
foreach($files as $file) {
//make sure the file exists
if(file_exists($file)) {
$valid_files[] = $file;
}
}
}
//if we have good files...
if(count($valid_files)) {
//create the archive
$zip = new ZipArchive();
if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {
return false;
}
//add the files
foreach($valid_files as $file) {
$zip->addFile($file,$file);
}
//debug
//echo 'The zip archive contains ',$zip->numFiles,' files with a status of ',$zip->status;

//close the zip -- done!
$zip->close();

//check to make sure the file exists
return file_exists($destination);
}
else
{
return false;
}
}
/***** Example Usage ***/
$files=array('file1.jpg', 'file2.jpg', 'file3.gif');
create_zip($files, 'myzipfile.zip', true);

17. PHP解压缩 Zip 文件

/**********************
*@file - path to zip file
*@destination - destination directory for unzipped files
*/
function unzip_file($file, $destination){
// create object
$zip = new ZipArchive() ;
// open archive
if ($zip->open($file) !== TRUE) {
die ('Could not open archive');
}
// extract contents to destination directory
$zip->extractTo($destination);
// close archive
$zip->close();
echo 'Archive extracted to directory';
}

 $time = '2010-1-11';
 
 //定义一个日间我相把把它变成2010-01-1
 
 $splitDate = explode("-",$time);
 
 //进行拆分以"-"分开
 
 $stime = mktime(0,0,0,$splitDate[1],$splitDate[2],$splitDate[0]);
 
 //再用mktime把它转换成时间载
 
 if( intval( $splitDate[1] )<10 && substr( $splitDate[1],0,1) !='0' )
 {
  $splitDate[1] = '0'.$splitDate[1];
 }
 //对月分取一个数字判断如果是01这种格式就不操作反之就加个0
 
 if( intval( $splitDate[2] )<10 && substr( $splitDate[2],0,1) !='0' )
 {
  $splitDate[2] = '0'.$splitDate[2];
 }
 //对日期作同样的作了，小于10就补0
 
 /*
  函数分析:
   explode 使用一个字符串分割另一个字符串 array explode ( string separator, string string [, int limit] )
   <a href=/phper/21/101d7c9a91356a428c8039c03dd4500b.htm>mktime</a>  函数返回一个日期的 Unix 时间戳。 mktime(hour,minute,second,month,day,year,is_dst)
   <a href=/phper/18/9351c693420d88336920eb2c12fca245.htm>intval</a> int intval ( mixed var [, int base])
通过使用特定的进制转换（默认是十进制），返回变量 var 的 integer 数值。

   substr  函数返回字符串的一部分 substr(string,start,length)
   
 */
 ?>

本站原创教程，转载注明来自www.111cn.net

function destroyDir($dir, $virtual = false)
{
$ds = DIRECTORY_SEPARATOR;
$dir = $virtual ? realpath($dir) : $dir;
$dir = substr($dir, -1) == $ds ? substr($dir, 0, -1) : $dir;
if (is_dir($dir) && $handle = opendir($dir))
{
while ($file = readdir($handle))
{
if ($file == '.' || $file == '..')
{
continue;
}
elseif (is_dir($dir.$ds.$file))
{
destroyDir($dir.$ds.$file);
}
else
{
unlink($dir.$ds.$file);
}
}
closedir($handle);
rmdir($dir);
return true;
}
else
{
return false;
}
}

 

function list_files($dir)
{
if(is_dir($dir))
{
if($handle = opendir($dir))
{
while(($file = readdir($handle)) !== false)
{
if($file != "." && $file != ".." && $file != "Thumbs.db")
{
echo '<a target="_blank" href="'.$dir.$file.'">'.$file.'</a><br>'." ";
}
}
closedir($handle);
}
}
}

在我们生活中，或是说网络编程中经常会碰到PHP验证邮件地址的要求，下面我们就来看看关系PHP验证邮件地址代码与实例吧。

 

电子邮件验证也许是中最常用的网页表单验证，此代码除了验证电子邮件地址，也可以选择检查邮件域所属 DNS 中的 MX 记录，使邮件验证功能更加强大。

function is_valid_email($email, $test_mx = false)
{
if(eregi("^([_a-z0-9-]+)(.[_a-z0-9-]+)*@([a-z0-9-]+)(.[a-z0-9-]+)*(.[a-z]{2,4})$", $email))
if($test_mx)
{
list($username, $domain) = split("@", $email);
return getmxrr($domain, $mxrecords);
}
else
return true;
else
return false;
}

function readable_random_string($length = 6){
$conso=array("b","c","d","f","g","h","j","k","l",
"m","n","p","r","s","t","v","w","x","y","z");
$vocal=array("a","e","i","o","u");
$password="";
srand ((double)microtime()*1000000);
$max = $length/2;
for($i=1; $i<=$max; $i++)
{
$password.=$conso[rand(0,19)];
$password.=$vocal[rand(0,4)];
}
return $password;
}

function generate_rand($l){
$c= "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
srand((double)microtime()*1000000);
for($i=0; $i<$l; $i++) {
$rand.= $c[rand()%strlen($c)];
}
return $rand;
}