PHP String (iii)

  
 

   
  

  
 $f=(string)1050089;
   
  

  
 for($i=0;$i<strlen($f);$i++){
   
  

  
 //echo $f{$i}.‘<br>‘; //把102输出把数字转换成字符串输出
   
  

  
 //echo substr($f, $i,1).‘<br>‘;//把102输出把数字转换成字符串输出
  
 

Statistics Total Traffic

  
 

   
  

  
 $f=(string)1050089;
   
  

  
 $info="共";
   
  

  
 for($i=0;$i<strlen($f);$i++){
   
  

  
 $s=substr($f, $i,1);
   
  

  
 $info.=";
   
  

  
 }
   
  

  
 echo $info. ‘人访问‘;
   
  

  
 
   
  

  
 
  
 

Regular expressions
Regular expression substitution

  
 

   
  
 
   
$p="/a+/"; //+表示一个以上 .表示任意字符 *0个或者多个字符
 
   
$str ="java aap mysql";
 
   
echo preg_replace($p, ‘*‘, $str);
 
  
  
 

Regular expression Verification phone number

 
   
  

  
    
   
 $telp="/^1[3,5,,8][0-9]{9}$/";
  
    
   
 $aa="1871799698";
  
    
   
 echo preg_match($telp, $aa);
 
   
  

The regular expression must be 126 mailboxes,

 
   
  
 
    
   
 $mailp  =   "/^[a-z]{1}[a-z_0-9]{3,6}@126\.com$/"    
 
    
   
 $ EM  =   "[email protected]"    
 
    
   
  (  $mailp    $em  );   
 
   
  

The regular expression Preg_match found returned 1 did not find return 0, Preg_match_all found the number of returns, did not find return 0

  
 

   
  

  
$ps="/\d/";
   
  

  
$s="he54 p12 ja544";
   
  

  
echo preg_match($ps, $s);//1
   
  

  
echo preg_match_all($ps, $s);//7 
  
 

  
 

   
  

  
$ps="/\d/";
   
  

  
$s="he54 p12 ja544";
   
  

  
echo preg_match_all($ps, $s,$a);
   
  

  
echo ‘<pre>‘;
   
  

  
print_r($a);//打印处找到的数组
  
 

Regular expression judgment

  
 

   
  

  
$p="/^\w{6,8}$/";//\w表示0-9 _a-z
   
  

  
$s="111111111";
   
  

  
if(preg_match($p,$s)){
   
  

  
echo ‘账号合理‘;
   
  

  
}else{
   
  

  
echo ‘账号非法‘;
   
  

  
}
  
 

PHP build file Add content Close function

 
   
  

  
    
   
$f=fopen("f:/a.txt","a");//a为追加没有就会自动建立
  
    
   
fwrite($f,‘12‘);//12为填写的内容，执行一次就填入一次
  
    
   
//fclose($f);
 
   
  

\ r \ n line break 8 means append, refresh once display once

 
   
  

  
    
   
 file_put_contents(‘ab.txt‘, "asdf\r\n",8);//写入数据
 
   
  

 
   
  

  
    
   
file_get_contents(‘a.txt‘); //读取数据
 
   
  

 
   
  

  
    
   
file_exists()//判断文件是否存在
 
   
  

echo count (file (_file_)); Statistics on the number of money bar information
echo is_dir (' F:/mysql '); Find if there is a f:/mysql if present returns 1 does not exist return 0;




From for notes (Wiz)

PHP String (iii)