php setcookie时值为null或空字符串(删除cookie)

$name = "post_url";
$value =  "";
setcookie($name, $value,  time()+60*60*3, "/" );

delete_cookie

173 PHP_FUNCTION(setcookie)
174 {
175     char *name, *value = NULL, *path = NULL, *domain = NULL;
176     long expires = 0;
177     zend_bool secure = 0, httponly = 0;
178     int name_len, value_len = 0, path_len = 0, domain_len = 0;
179
180     if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|slssbb", &name,
181                               &name_len, &value, &value_len, &expires, &path,
182                               &path_len, &domain, &domain_len, &secure, &httponly) ==

FAILURE) {
183         return;
184     }
185
186     if (php_setcookie(name, name_len, value, value_len, expires, path, path_len, domain,

domain_len, secure, 1, httponly TSRMLS_CC) == SUCCESS) {
187         RETVAL_TRUE;
188     } else {
189         RETVAL_FALSE;
190     }  
191 }      
 
 
 
 76 PHPAPI int php_setcookie(char *name, int name_len, char *value, int value_len, time_t

expires, char *path, int path_len, char *domain, int domain_len, int secure, int url_encode,

int httponly TSRMLS_DC)
 77 {
 78     char *cookie, *encoded_value = NULL;
 79     int len=sizeof("Set-Cookie: ");
 80     char *dt;
 81     sapi_header_line ctr = {0};
 82     int result;
 83
 84     if (name && strpbrk(name, "=,; trn1314") != NULL) {   /* man isspace for 13

and 14 */
 85         zend_error( E_WARNING, "Cookie names cannot contain any of the following '=,;

\t\r\n\013\014'" );
 86         return FAILURE;
 87     }
 88
 89     if (!url_encode && value && strpbrk(value, ",; trn1314") != NULL) { /* man

isspace for 13 and 14 */
 90         zend_error( E_WARNING, "Cookie values cannot contain any of the following ',;

\t\r\n\013\014'" );
 91         return FAILURE;
 92     }
 93
 94     len += name_len;
 95     if (value && url_encode) {
 96         int encoded_value_len;
 97
 98         encoded_value = php_url_encode(value, value_len, &encoded_value_len);
 99         len += encoded_value_len;
100     } else if ( value ) {
101         encoded_value = estrdup(value);
102         len += value_len;
103     }
104     if (path) {
105         len += path_len;
106     }
107     if (domain) {
108         len += domain_len;
109     }
110
111     cookie = emalloc(len + 100);
112
113     if (value && value_len == 0) {
114         /*
115          * MSIE doesn't delete a cookie when you set it to a null value
116          * so in order to force cookies to be deleted, even on MSIE, we
117          * pick an expiry date in the past
118          */
119         dt = php_format_date("D, d-M-Y H:i:s T", sizeof("D, d-M-Y H:i:s T")-1, 1, 0

TSRMLS_CC);
120         snprintf(cookie, len + 100, "Set-Cookie: %s=deleted; expires=%s", name, dt);
121         efree(dt);
122     } else {
123         snprintf(cookie, len + 100, "Set-Cookie: %s=%s", name, value ? encoded_value :

"");
124         if (expires > 0) {
125             const char *p;
126             strlcat(cookie, "; expires=", len + 100);
127             dt = php_format_date("D, d-M-Y H:i:s T", sizeof("D, d-M-Y H:i:s T")-1,

expires, 0 TSRMLS_CC);
128             /* check to make sure that the year does not exceed 4 digits in length */
129             p = zend_memrchr(dt, '-', strlen(dt));
130             if (!p || *(p + 5) != ' ') {

<?php

define('NO_FILE', '不存在上传文件');
define('NOT_ALLOW_EXT', '文件类型不在允许范围内');
define('NOT_ALLOW_SIZE', '文件大小不在允许范围内');
define('HAS_THE_FILE', '该文件已经存在');
define('UPLOAD_FAILED', '上传失败');
define('UPLOAD_SUCCESS', '上传成功');

class file_uploader
{

    var $_file;
    var $_filesize;
    var $_fileext;
    var $_filedir;
    var $_filename;
    var $_filetmpname;
   
    var $allowsize;
    var $allowext;
   
    var $neednewname;
    var $newname;
    var $syslang;
   
    var $report;
   
    function ready($filedir = '', $file, $allowsize = '', $allowext = '', $neednewname = false, $report = 0){
        $this->_filedir = is_dir($filedir) ? $filedir : '';
        if(empty($file) || !isset($file['size']) || $file['size'] == 0) $this->error(NO_FILE);
        $this->_filesize = $file['size'];
        $this->_filename = $file['name'];
        $this->_filetmpname = $file['tmp_name'];
       
        $this->allowsize = $allowsize;
        $this->allowext = $allowext;
       
        $this->neednewname = ($neednewname) ? true : false;
        $this->newname = '';
       
        $this->report = $report;
    }
   
    function do_upload(){
        if(!is_uploaded_file($this->_filetmpname)) $this->error(NO_FILE);
        if($this->chk_ext()){
            $this->error(NOT_ALLOW_EXT);
            return '';
        }
        if($this->chk_size()){
            $this->error(NOT_ALLOW_SIZE);
            return '';
        }
        if($this->neednewname) $this->newname = $this->generate_name().".".$this->get_fileext();
        if($this->chk_hasfile()){
            $this->error(HAS_THE_FILE);
            return '';
        }
        $filename = empty($this->newname) ? @iconv('utf-8','gb2312',$this->_filename) : $this->newname;
        @chmod($this->_filedir.$filename, 0777);
        if(move_uploaded_file($this->_filetmpname, $this->_filedir.$filename)){
            return $this->result();
        }else{
            $this->error(UPLOAD_FAILED);
            return '';
        }
    }
   
    function chk_ext(){
        if(empty($this->allowext) || in_array($this->get_fileext(), explode("|",$this->allowext))) return false;
        return true;
    }
   
    function chk_size(){
        if(empty($this->allowsize) || get_filesize <= $this->allowsize*1024*1024) return false;
        return true;
    }
   
    function get_filesize(){
        return $this->_filesize;
    }
   
    function get_fileext(){
        return substr($this->_filename,strrpos($this->_filename,".")+1);
    }
   
    function generate_name(){
        return substr(md5(time()),26);
    }
   
    function chk_hasfile(){
        return is_file($this->_filedir.$this->_filename);
    }
   
    function error($tip){
        echo $tip;
    }
   
    function result(){
        if($this->report){
            $filename = empty($this->newname) ? $this->_filename : $this->newname;
            $arr = array('filename' => $filename, 'filesize' => $this->_filesize, 'tip' => UPLOAD_SUCCESS);
            return $arr;
        }else{
            return UPLOAD_SUCCESS;
        }
    }
}

/***使用方法与参数说明***/
/***
    第一个参数$dir 为上传文件存放的路径
    第二个参数为$_FILES 为你那个上传文件变量
    第三个参数允许文件大小 单位为MB
    第四个参数允许的文件类型 格式为jpg|png|gif
    第五个参数是否需要生成新的文件名
    第六个参数为返回的提示格式 0为直接提示上传正确 1则返回一个数组array('filename' => $filename, 'filesize' => $this->_filesize, 'tip' => UPLOAD_SUCCESS);
***/

//require("类文件");
//$u = new file_uploader;
//$u->ready($dir, $_FILES['upload_file'], false, false, true, 0);
//echo $u->do_upload();

?>

    $dir = 'upload/';
    require("upload_class.php");
    $u = new file_uploader;
    $u->ready($dir, $_FILES['upload_file'], false, false, true, 0);
    echo $u->do_upload();

$meta = get_meta_tags('http://www.111cn.net/');
$keywords = $meta['keywords'];
// 分割关键词
$keywords = explode(',', $keywords );
// 整理
$keywords = array_map( 'trim', $keywords );
// 去掉空内容
$keywords = array_filter( $keywords );

print_r( $keywords );

$html = file_get_contents('http://www.111cn.net');

$dom = new DOMDocument();
@$dom->loadHTML($html);

$xpath = new DOMXPath($dom);
$hrefs = $xpath->evaluate("/html/body//a");

for ($i = 0; $i < $hrefs->length; $i++) {
       $href = $hrefs->item($i);
       $url = $href->getAttribute('href');
       echo $url.'<br />';
}

function _make_url_clickable_cb($matches) {
 $ret = '';
 $url = $matches[2];
 
 if ( empty($url) )
  return $matches[0];
 // 去掉 URL 后面的标点符号
 if ( in_array(substr($url, -1), array('.', ',', ';', ':')) === true ) {
  $ret = substr($url, -1);
  $url = substr($url, 0, strlen($url)-1);
 }
 return $matches[1] . "<a href="$url" rel="nofollow">$url</a>" . $ret;
}
 
function _make_web_ftp_clickable_cb($matches) {
 $ret = '';
 $dest = $matches[2];
 $dest = 'http://' . $dest;
 
 if ( empty($dest) )
  return $matches[0];
 if ( in_array(substr($dest, -1), array('.', ',', ';', ':')) === true ) {
  $ret = substr($dest, -1);
  $dest = substr($dest, 0, strlen($dest)-1);
 }
 return $matches[1] . "<a href="$dest" rel="nofollow">$dest</a>" . $ret;
}
 
function _make_email_clickable_cb($matches) {
 $email = $matches[2] . '@' . $matches[3];
 return $matches[1] . "<a href="mailto:$email">$email</a>";
}
 
function make_clickable($ret) {
 $ret = ' ' . $ret;
 $ret = preg_replace_callback('#([s>])([w]+?://[w\x80-\xff#$%&~/.-;:=,?@[]+]*)#is', '_make_url_clickable_cb', $ret);
 $ret = preg_replace_callback('#([s>])((www|ftp).[w\x80-\xff#$%&~/.-;:=,?@[]+]*)#is', '_make_web_ftp_clickable_cb', $ret);
 $ret = preg_replace_callback('#([s>])([.0-9a-z_+-]+)@(([0-9a-z-]+.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret);
 
 $ret = preg_replace("#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i", "$1$3</a>", $ret);
 $ret = trim($ret);
 return $ret;
}

function data_uri($file, $mime) {
  $contents=file_get_contents($file);
  $base64=base64_encode($contents);
  echo "data:$mime;base64,$base64";
}

function cleanHTML($html) {

// 首先去掉无用的标签（可以自定义更多需要清除的标签）

$html = ereg_replace("<(/)?(font|span|del|ins)[^>]*>","",$html);

// 然后再运行两遍去掉无用属性

$html = ereg_replace("<([^>]*)(class|lang|style|size|face)=("[^"]*"|'[^']*'|[^>]+)([^>]*)>","<1>",$html);
$html = ereg_replace("<([^>]*)(class|lang|style|size|face)=("[^"]*"|'[^']*'|[^>]+)([^>]*)>","<1>",$html);

return $html
}

function wpjam_minify_html($html) {

    $search = array(
        '/>[^S ]+/s',  // 删除标签后面空格
        '/[^S ]+</s',  // 删除标签前面的空格
        '/(s)+/s'       // 将多个空格合并成一个
    );

    $replace = array(
        '>',
        '<',
        '\1'
    );

    $html = preg_replace($search, $replace, $html);

    return $html;
}

if(!is_admin()){
 add_action("wp_loaded", 'wp_loaded_minify_html');
 function wp_loaded_minify_html(){
  ob_start('wpjam_minify_html');
 }
}

$temppath=$upfile['tmp_name'];
   $fileinfo=pathinfo($upfile['name']);
   $extension=$upfile['type'];
   //echo $extension;
   //exit;
   switch( $extension )
   {
    case 'application/msword':
    $extension ='doc';
    break;
    case 'application/vnd.ms-excel':
    $extension ='xls';
    break;
    case 'application/vnd.openxmlformats-officedocument.wordprocessingml.document':
    $extension ='docx';
    break;
    case 'application/vnd.ms-powerpoint':
    $extension ='ppt';
    break;
    case 'application/pdf':
    $extension ='pdf';
    break;
    case 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet':
    $extension ='xlsx';
    break;
    default:
    die('只允许上传doc,docx,xls,pdf,ppt文件 <a href="a.php">重新上传</a>');
   
   }