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php ËÑË÷Êý×e×Ö*u´®ÎÒÃÇÒ»°a»aÓõ½array_searchºÍin_arrayÁ½¸oº¯Êý

array_search()º¯ÊýÓe in_array()Ò»Ñu£¬ÔÚÊý×eÖвeÕÒÒ»¸o¼uÖµ¡£Èç¹uÕÒµ½Á˸ÃÖµ£¬Æ¥ÅaÔªËصļuÃu»a±»µ»Ø¡£Èç¹uûÕÒµ½£¬Ôoµ»Ø false¡£

µ«ÊÇarray_searchÒ»°aÓõ½ËÑË÷Ò»¸oÊý×eÖÐuºÏÒªÇoµÄµÚÒ»¸o×Öu´®¡£Èç¹uËÑË÷µÄ×Öu´®ÔÚÊý×eÖк¬Óжa¸o£¬Ê¹ÓÃarray_searchµÄ»°£¬ÊÇ ²»Ðеġ£Õaʱ£¬ÎÒÃÇʹÓÃarray_keys()º¯Êý£¬ÊµÏÖËÑË÷µÄ×Öu´®ÔÚÊý×eÖк¬Óжa¸o£¬

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    $array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red'); 
    $a=array_search( "blue",$array); //½«Êa³o$a=0; 
    $b=array_search( 'red',$array); //½«Ö»»aÊa³o$b=1; 
    $p = array_keys($array, 'red');//ËÑË÷µÄ×Ö*u´®ÔÚÊý×eÖк¬Óжa¸o 
    if(is_array($p)) {
      foreach($p as $v) { 
        echo $val."³oÏÖÔÚ".$v . " ";
       }
    }else { 
      echo $val."³oÏÖÔÚ".array_search($val, $array)." ";
    }

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    $array = array(4,5,7,8,9,10); 
    $found = array_search(8, $array); //µ÷ÓÃarray_searchº¯Êý²¢Êa³o²eÕÒ½a¹u 
    if($found){ //Èç¹uÕÒµ½Êa³o¼u 
    echo "ÒÑÕÒµ½£¬¼uΪ".$found; 
    }else{ //Èç¹uûÓÐÕÒµ½Êa³o´iÎoÐÅÏ¢ 
    echo "ûÓÐÕÒµ½"; 
    }

ÏÂÃaeÎÒÃÇÀ´¿´¿´in_arrayº¯Êý

²ÉÓÃin_array(value,array,type)

type ¿ÉÑ¡¡£Èç¹uÉeÖøòÎÊýΪ true£¬Ôo¼i²eËÑË÷µÄÊý¾ÝÓeÊý×eµÄÖµµÄÀaÐÍÊÇ*ñÏaͬ¡£

    $arr = array('¿ÉÒÔ','ÈçºÎ','*½*¨','ÖªµÀ','›]ÓÐ','²»Òª');
    //in_array(value,array,type)
    $isin = in_array("ÈçºÎ2",$arr);
    if($isin){
      echo "in====".$isin;
    }else{
      echo "out====".$isin;
    }

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