php 遍历二维数组与多维数组代码

$employee[]=array("jas,join","www.111cn.net",20);
 $employee[]=array("june,join","programmer",20);
 $employee[]=array("aili,join","programmer",20);
 $employee[]=array("doe,jane","programmer",20);

 $newname = array();

 foreach ($employee as $record){

  $newname[] = isset($record[0]) ? $record[0] : 'no name';

 }

$a=array("red", "green", "blue", "yellow");   
count($a); //得到4   
unset($a[1]); //删除第二个元素   
count($a); //得到3   
echo $a[2]; //数组中仅有三个元素,本想得到最后一个元素,但却得到blue,   
echo $a[1]; //无值 

//array array_splice (array input, int offset [, int length [, array replacement]])
//array_splice()其实是替换数组元素的函数,但如果不加替换值就简单的删除元素.下面是array_splice()的用法:
$b=array("red", "green", "blue", "yellow");
array_splice($a,1,1);

$array1 = array(1 => "www.111cn.net", 2 => "菠萝", 4 => "www.111cn.net",3 => "香蕉",4 => "芭乐",5 => "www.111cn.net",6 => "www.111cn.net");

$search_keys = array_keys($array1, "www.111cn.net");

foreach($search_keys as $key) {
 unset($array1[$key]);
}

strip_tags();

//方法二利用正则过滤
function _filter( $string ) {
  return str_replace(array(" "," "," ",'  '),array('<br />','<br />','<br />',' &nbsp;'),strip_tags($string,'<br><p><img>'));
}

function delhtml($str){   //清除html标签
$st=-1; //开始
$et=-1; //结束
$stmp=array();
$stmp[]="&nbsp;";
$len=strlen($str);
for($i=0;$i<$len;$i++){
   $ss=substr($str,$i,1);
   if(ord($ss)==60){ //ord("<")==60
    $st=$i;
   }
   if(ord($ss)==62){ //ord(">")==62
    $et=$i;
    if($st!=-1){
     $stmp[]=substr($str,$st,$et-$st+1);
    }
   }
}
$str=str_replace($stmp,"",$str);
return $str;
}
//

$str='<div class="newscon" id="idnewsdtail"><span id=contextid>
<p>　　www.111cn.net<nr /> <br>
';
    $reg = '/(</?p>|<brs*/?>)|<.+?>/i';
    echo preg_replace($reg,'$1',$str);

function rand_create(){
    //通知浏览器将要输出png图片

    header('content-type: image/png');

    //准备好随机数发生器种子
    srand((double)microtime()*1000000);
    //准备图片的相关参数
    $im = imagecreate(62,20);
    $black = imagecolorallocate($im, 0,0,0); //rgb黑色标识符
    $white = imagecolorallocate($im, 255,255,255); //rgb白色标识符
    $gray = imagecolorallocate($im, 200,200,200); //rgb灰色标识符
    //开始作图   
    imagefill($im,0,0,$gray);
    while(($randval=rand()%100000)<10000);{
        //将四位整数验证码绘入图片
     session_start();
   $_session['login_check_num'] = $randval;
        imagestring($im, 5, 10, 3, $randval, $black);
    }
    //加入干扰象素
    for($i=0;$i<200;$i++){
        $randcolor = imagecolorallocate($im,rand(0,255),rand(0,255),rand(0,255));
        imagesetpixel($im, rand()%70 , rand()%30 , $randcolor);
    }
    //输出验证图片
    imagepng($im);
    //销毁图像标识符
    imagedestroy($im);
}