php中匹配邮箱地址正则表达式

<script>
function Email(ee){
var emailreg = "^\w+@\w+\.\w+(\.\w+)*$";

var rege = new RegExp(emailreg, 'g');
alert(rege.test(ee));
}
var ee1 = "12xwz@123e^rsrf6.csdfdfom.df";
var ee2 = "12xwz@123ersrf6.csdfdfom.df";
Email(ee1);
Email(ee2);
</script>

<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland");

if (in_array("Glenn",$people))
  {
  echo "Match found";
  }
else
  {
  echo "Match not found";
  }
?>

输出：

Match found

 
$fruit["apple"] = "red";
$fruit["banana"] = "yellow";
$fruit["pear"] = "green";
if(array_key_exists("apple", $fruit)){
 printf("apple's color is %s",$fruit["apple"]);
}

//apple's color is red

 
$fruits["apple"] = "red";
$fruits["banana"] = "yellow";
$fruits["watermelon"]="green";
$founded = array_search("green", $fruits);
if($founded)
 printf("%s was founded on %s.",$founded, $fruits[$founded]);

//watermelon was founded on green.

$fruits["apple"] = "red";
$fruits["banana"] = "yellow";
$fruits["watermelon"]="green";
$keys = array_keys($fruits);
print_r($keys);

//Array ( [0] => apple [1] => banana [2] => watermelon )

 
$fruits["apple"] = "red";
$fruits["banana"] = "yellow";
$fruits["watermelon"]="green";
$values = array_values($fruits);
print_r($values);

//Array ( [0] => red [1] => yellow [2] => green )

$foo[1]['a']['xx'] = 'bar 1';
$foo[1]['b']['xx'] = 'bar 2';
$foo[2]['a']['bb'] = 'bar 3';
$foo[2]['a']['yy'] = 'bar 4';
$foo[3]['c']['dd'] = 'bar 3';
$foo[3]['f']['gg'] = 'bar 3';
$foo['info'][1] = 'bar 5';

如果要查找 bar 3 怎么进行查找呢。有三个结果，而这三个结果都要，看下面的函数：
-------------------------------------------------------------------------------------------------------------------------------
function array_search_re($needle, $haystack, $a=0, $nodes_temp=array()){
global $nodes_found;
$a++;
foreach ($haystack as $key1=>$value1) {
    $nodes_temp[$a] = $key1;
    if (is_array($value1)){  
      array_search_re($needle, $value1, $a, $nodes_temp);
    }
    else if ($value1 === $needle){
      $nodes_found[] = $nodes_temp;
    }
}
return $nodes_found;
}
---------------------------------------------------------------------------------------------------------------------------------
这个函数就可以把上面要查找到的内容全部返回出键名来
$result = array_search_re('bar 3', $foo);

print_r($result);

输出结果为如下：
Array ( [0] => Array ( [1] => 2 [2] => a [3] => bb )
          [1] => Array ( [1] => 3 [2] => c [3] => dd )
          [2] => Array ( [1] => 3 [2] => f [3] => gg )
        )

function array_search_key($needle, $haystack){
global $nodes_found;

foreach ($haystack as $key1=>$value1) {
 
 if ($key1=== $needle){
 
  $nodes_found[] = $value1;
      
   }
    if (is_array($value1)){  
      array_search_key($needle, $value1);
    }
  
  
}

return $nodes_found;
}
$result = array_search_key('a', $foo);

print_r($result);

输出结果为如下：
 

Array
(
    [0] => Array
        (
            [xx] => bar 1
        )

    [1] => Array
        (
            [bb] => bar 3
        )

    [2] => Array
        (
            [yy] => bar 4
        )

)

<?php
class listdir{
var $depth;
var $dirname;
var $list;
var $tostring;

function listdir($dir){
$this->dirname=$dir;
$this->depth=0;
$this->tostring=”";
}

//把结果保存进多维数组
function getlist($dir=”"){
if($dir==”")$dir=$this->dirname;
$d=@dir($dir);
while(false!==($item=$d->read()))
{
if($item!=”.”&&$item!=”..”)
{
$path=$dir.”/”.$item;
if(is_dir($path)){
$this->depth+=1;
$this->getlist($path);
}else{
$this->list[$this->depth][]=$item;
}
}
}
$this->list[$this->depth]['directory']=$dir;
$this->depth-=1;
$d->close();
return $this->list;
}

//字符窜化结果

function tostring($dir=”"){
if($dir==”")$dir=$this->dirname;
$d=@dir($dir);
$this->tostring.=”<UL>n”;
$this->tostring.=”Directory:”.$dir.”n”;
while(false!==($item=$d->read()))
{
if($item!=”.”&&$item!=”..”)
{
$path=$dir.”/”.$item;
if(is_dir($path)){
$this->depth+=1;
$this->tostring($path);
}else{
$this->tostring.=”<LI>”.$item.”</LI>n”;
}
}
}
$this->depth-=1;
$d->close();
$this->tostring.=”</UL>n”;
return $this->tostring;
}
}
$wapdir=”jquery”;
$d=new listdir($wapdir);
echo $d->tostring();
?>

ini_set(“display_errors”,off) //修改为不显示错误报告

ini_get(“upload_max_filesize”) //读取配置文件中上传文件大小限制

try{

可能出错的代码

throw new Exception(“异常信息”)

}catch(Exception $e[异常对象]){

后面的正常代码

}

function   runtimeErrorHandler($level,$string)
{
//自定义错误处理时，手动抛出一个异常实例
//为了把错误级别代码也显示出来，这里拼接了错误代码和错误信息作为新的错误信息来传递。
throw   new   Exception($level.'|'.$string);
}
//设置自定义错误处理函数
set_error_handler( "runtimeErrorHandler");

try
{
$a=2/0; 
//这里制造一个以前无法截获的除0错误
}
catch(Exception $e)
{
echo '错误信息:', $e->getMessage();
//显示错误，这里就可以看到错误级别和错误信息了“2|Division by zero”
}

^[1-9]d*$　 　 //匹配正整数
^-[1-9]d*$ 　 //匹配负整数
^-?[1-9]d*$　　 //匹配整数
^[1-9]d*|0$　 //匹配非负整数（正整数 + 0）
^-[1-9]d*|0$　　 //匹配非正整数（负整数 + 0）
^[1-9]d*.d*|0.d*[1-9]d*$　　 //匹配正浮点数
^-([1-9]d*.d*|0.d*[1-9]d*)$　 //匹配负浮点数
^-?([1-9]d*.d*|0.d*[1-9]d*|0?.0+|0)$　 //匹配浮点数
^[1-9]d*.d*|0.d*[1-9]d*|0?.0+|0$　　 //匹配非负浮点数（正浮点数 + 0）
^(-([1-9]d*.d*|0.d*[1-9]d*))|0?.0+|0$　　//匹配非正浮点数（负浮点数 + 0）

^[A-Za-z]+$　　//匹配由26个英文字母组成的字符串
^[A-Z]+$　　//匹配由26个英文字母的大写组成的字符串
^[a-z]+$　　//匹配由26个英文字母的小写组成的字符串
^[A-Za-z0-9]+$　　//匹配由数字和26个英文字母组成的字符串
^w+$　　//匹配由数字、26个英文字母或者下划线组成的字符串
评注：最基本也是最常用的一些表达式

$str = "php编程";
if (preg_match("/^[x{4e00}-x{9fa5}]+$/u",$str)) {
print("该字符串全部是中文");
} else {
print("该字符串不全部是中文");
}

$str = "singlepoint单点日志";
if (preg_match("/^[x{4e00}-x{9fa5}]+$/u",$str)) {
print("该字符串全部是中文");
} else {
print("该字符串不全部是中文");
}

$alias_len = mb_strlen($value['alias'], "utf-8");
$temp_array = array();
for($i = 0;$i<$alias_len; $i++)
{
 $temp_array[$i] = mb_substr($value['alias'],$i,1,"utf-8");
 if(ord(substr($temp_array[$i],0,1))>'0xe0' && strlen($temp_array[$i])<3)
     $temp_array[$i] = '';

}
$value['alias'] = implode('',$temp_array);

$str = "123 456";
$patten = "/s+/";
$result = split($patten,$str);
echo join("<br>",$result);