php实现字符转URL实现代码

function tourl($str) {
  $str = preg_replace('/[^a-zA-Z0-9]+/', '-', $str);
  $str = trim($str, '-');
  return strtolower($str);
}

header('Content-type: text/html; charset=utf-8');  
  
echo '<br />百度关键词URL编码转换示例：<br />'; 

$urlBaidu = 'http://www.baidu.com/s?wd=%D6%D0%CE%C4'; 

$arrParse = parse_url($urlBaidu); 

parse_str($arrParse ['query'],$output); 

echo '乱码：' . $output['wd'] . '<br />';  
//将gb2312编码转换成utf-8编码 

$strUTF8 = mb_convert_encoding($output['wd'], 'utf-8', 'gb2312'); 

echo '可读码：' . $strUTF8 . '<br />';  

echo '<br />谷歌关键词URL编码转换示例：<br />'; 

$urlGoogle = 'http://www.google.cn/search?hl=zh-CN&source=hp&q=%E4%B8%AD%E6%96%87&aq=f&oq='; 
    
$arrParse = parse_url($urlGoogle); 

parse_str($arrParse ['query'],$output); 
//谷歌关键词URL编码是utf-8，不用再作转换 

echo '可读码：' . $output['q'] . '<br />';

  function overloadFun($param1, $param2 = '1',$param3 = true)
  {
   // do something
  }

function rewrite() {  
$args = func_get_args();  
if(func_num_args() == 1) {  
func1($args[0]);  
} else if(func_num_args() == 2) {  
func2($args[0], $args[1]);  
}  
}  
 
function func1($arg) {  
echo $arg;  
}  
 
function func2($arg1, $arg2) {  
echo $arg1, ' ', $arg2;  
}  
 
rewrite('PHP'); //调用func1  
rewrite('PHP','China'); //调用func2  

<?php
 
  class OverLoad{
   function __call($name, $args)
   {
  if($name=='overloadFun')
  {
   switch(count($args))
   {
    case 0: $this->overloadFun0();break;
    case 1: $this->overloadFun1($args[0]); break;
    case 2: $this->overloadFun2($args[0], $args[1]); break;
    default: //do something
      break;
   }
  }
   }
  
   function overloadFun0()
   {
  echo 0;
   }
  
   function overloadFun1($var1)
   {
  echo $var1;
   }

   function overloadFun2($var1,$var2)
   {
 
  echo $var1+$var2;
   }
  } 
   $test=new OverLoad();
  
   $test->overloadFun()."<br />".
   $test->overloadFun(1)."<br />".
   $test->overloadFun(1,2)."<br />";
  
?>

$to = 'xxxxx@gmail.com';
$from = 'Solagirl <sola@solagirl.net>';
$subject = 'Mail Subject';
$message = 'html content (with html tags)';
//定义边界，边界值尽可能唯一
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
//多部分消息的header声明与单一格式不同
$headers .= "MIME-Version: 1.0＼n" . "Content-Type: multipart/alternative; boundary=＼"{$mime_boundary}＼"";
$headers .= "From: $from＼n";
//多部分消息 - HTML版本
$mailbody = "--{$mime_boundary}＼n" . "Content-Type: text/html; charset=＼"utf-8＼"＼n" .
"Content-Transfer-Encoding: 7bit＼n＼n" . $message . "＼n＼n";
//多部分消息 - 纯文本版本
$mailbody .= "--{$mime_boundary}＼n" . "Content-Type: text/plain; charset=＼"utf-8＼"＼n" .
"Content-Transfer-Encoding: 7bit＼n＼n" . strip_tags($message) . "＼n＼n";
//多部分消息结束
$mailbody .= "--{$mime_boundary}--";
mail($to, $subject, $message, $headers);

$mail->Body    = $body;
//$mail->AltBody存储纯文本版本
$mail->AltBody    = strip_tags($body);
$mail->WordWrap   = 50; // set word wrap
$mail->IsHTML(true);
$mail->MsgHTML($body);
$mail->Send()；

$tmpdata = $this->_agency_mod->find ( intval ( $value ) );
$img = $tmpdata [$value] ['agency_image'];
if(!empty($img)){
 $img = '../data/agency/' . $img;
 if (file_exists ( $img )) {
  unlink ( $img );
 }
}

<?php
$fh = fopen('test.html', 'a');
fwrite($fh, '<h1>Hello world!</h1>');
fclose($fh);
 
unlink('test.html');
?>

<?php
$file = "test.txt";
if (!unlink($file))
  {
  echo ("Error deleting $file");
  }
else
  {
  echo ("Deleted $file");
  }
?>

if(file_exists($fn)){//存在该文件

 //todo 删除

}