php ini_get函数使用方法详解

register_globals = Off

post_max_size = 8M

/* 字符串过滤函数 */ 

function stringFilter($str) 
{ 
if (ini_get(’magic_quotes_gpc)’)
{ 
return $str; 
}
else { 
return addslashes($str); 
} 
}

<?php
echo ini_get('display_errors'); //1
//动态修改php.ini配置信息，脚本执行后失效
ini_set('display_errors',0);
echo ini_get('display_errors');//0

<?php
//打印所有配置信息，巨多。。。
print_r(ini_get_all());

<?php

echo ini_get('display_errors'); //1
//动态修改php.ini配置信息，脚本执行后失效
ini_set('display_errors',0);
ini_restore('display_errors');
echo ini_get('display_errors');//1

date(“l”); //data就可以获取英文的星期比如Sunday
date(“w”); //这个可以获取数字星期比如123，注意0是星期日

$weekarray=array(“日”,”一”,”二”,”三”,”四”,”五”,”六”); //先定义一个数组

echo “星期”.$weekarray[date("w")];

$weekarray=array(“日”,”一”,”二”,”三”,”四”,”五”,”六”);
echo “星期”.$weekarray[date("w","2011-11-11")];

<?php echo $showtime=date("Y-m-d H:i:s");?>

date_default_timezone_set(UTC);

$curl = curl_init();
$url=’http://www.111cn.net’;
curl_setopt($curl, CURLOPT_URL, $url); //设置URL
curl_setopt($curl, CURLOPT_HEADER, 1); //获取Header
curl_setopt($curl,CURLOPT_NOBODY,true); //Body就不要了吧，我们只是需要Head
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); //数据存到成字符串吧，别给我直接输出到屏幕了
$data = curl_exec($curl); //开始执行啦～
echo curl_getinfo($curl,CURLINFO_HTTP_CODE); //我知道HTTPSTAT码哦～
curl_close($curl); //用完记得关掉他

<?php
if(!function_exists('get_headers')){
function get_headers($url,$format=0){
$url=parse_url($url);
$end="＼r＼n＼r＼n";
$fp=fsockopen($url['host'],(empty($url['port'])?80:$url['port']),$errno,$errstr,30);
if($fp){
$out="GET / HTTP/1.1＼r＼n";
$out.="Host: ".$url['host']."＼r＼n";
$out.="Connection: Close＼r＼n＼r＼n";
$var='';
fwrite($fp,$out);
while(!feof($fp)){
$var.=fgets($fp,1280);
if(strpos($var,$end))
break;
}
fclose($fp);
$var=preg_replace("/＼r＼n＼r＼n.*＼$/",'',$var);
$var=explode("＼r＼n",$var);
if($format){
foreach($var as $i){
if(preg_match('/^([a-zA-Z -]+): +(.*)$/',$i,$parts))
$v[$parts[1]]=$parts[2];
}
return $v;
}else{
    return $var;
   }
}
}
}
echo '<pre>';
print_r(get_headers('http://www.111cn.net'));

<?
//代码也可以用于统计目录数
//格式化输出目录大小 单位：Bytes，KB，MB，GB
 
function getDirectorySize($path)
{
  $totalsize = 0;
  $totalcount = 0;
  $dircount = 0;
  if ($handle = opendir ($path))
  {
    while (false !== ($file = readdir($handle)))
    {
      $nextpath = $path . '/' . $file;
      if ($file != '.' && $file != '..' && !is_link ($nextpath))
      {
        if (is_dir ($nextpath))
        {
          $dircount++;
          $result = getDirectorySize($nextpath);
          $totalsize += $result['size'];
          $totalcount += $result['count'];
          $dircount += $result['dircount'];
        }
        elseif (is_file ($nextpath))
        {
          $totalsize += filesize ($nextpath);
          $totalcount++;
        }
      }
    }
  }
  closedir ($handle);
  $total['size'] = $totalsize;
  $total['count'] = $totalcount;
  $total['dircount'] = $dircount;
  return $total;
}

//size()  统计文件大小
function size($byte)
{
    if($byte < 1024) {
      $unit="B";
    }
    else if($byte < 10240) {
      $byte=round_dp($byte/1024, 2);
      $unit="KB";
    }
    else if($byte < 102400) {
      $byte=round_dp($byte/1024, 2);
      $unit="KB";
    }
    else if($byte < 1048576) {
      $byte=round_dp($byte/1024, 2);
      $unit="KB";
    }
    else if ($byte < 10485760) {
      $byte=round_dp($byte/1048576, 2);
      $unit="MB";
    }
    else if ($byte < 104857600) {
      $byte=round_dp($byte/1048576,2);
      $unit="MB";
    }
    else if ($byte < 1073741824) {
      $byte=round_dp($byte/1048576, 2);
      $unit="MB";
    }
    else {
      $byte=round_dp($byte/1073741824, 2);
      $unit="GB";
    }

$byte .= $unit;
return $byte;
}

function round_dp($num , $dp)
{
  $sh = pow(10 , $dp);
  return (round($num*$sh)/$sh);
}