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*/

$array=array("size"=>"xl","color"=>"gold");   //¶¨ÒåÒ»¸öÊý×é
print_r(array_values($array));      //Êä³öÊý×éËùÓеÄÖµ

/*
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array_values() º¯Êý·µ»ØÒ»¸ö°üº¬¸ø¶¨Êý×éÖÐËùÓмüÖµµÄÊý×飬µ«²»±£Áô¼üÃû¡£

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array_values(array)
*/

$fruit=array('a'=>'apple','b'=>'banana','c'=>'cranberry'); //¶¨ÒåÒ»¸öÊý×é
reset($fruit);         //Ö¸ÕëÒƶ¯µÚÒ»¸öλÖÃ
while(list($key,$val)=each($fruit))     //Ñ­»·Êä³öÊý×éµÄ¼ü/Öµ¶Ô²¢Òƶ¯Ö¸Õë
{
  echo "$key=>$valn";       //Êä³öÊý×éµÄ¼ü¼°Öµ
}

/*

*/

$input=array("php½Ì³Ì",3.0,array("green","red"));    //¶¨ÒåÒ»¸öÊý×é
$result=array_reverse($input);       //½«Êý×éµßµ¹£¬²»±£Áô¼üÃû
$result_keyed=array_reverse($input,true);    //½«Êý×éµßµ¹£¬±£Áô¼üÃû
print_r($result);          //ÏÔʾµÚÒ»ÖÖ½á¹û
print_r($result_keyed);        //ÏÔʾµÚ¶þÖÖ½á¹û

/*
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array_reverse() º¯Êý½«Ô­Êý×éÖеÄÔªËØ˳Ðò·­×ª£¬´´½¨ÐµÄÊý×é²¢·µ»Ø¡£Èç¹ûµÚ¶þ¸ö²ÎÊýÖ¸¶¨Îª true£¬ÔòÔªËصļüÃû±£³Ö²»±ä£¬·ñÔò¼üÃû½«¶ªÊ§¡£

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array_reverse(array,preserve)
*/

$array=array(0=>100,"color"=>"red");      //¶¨ÒåÒ»¸öÊý×é
print_r(array_keys($array));        //·µ»Ø¸ÃÊý×éµÄËùÓмüÃû
$array=array("blue","red","green","blue","blue");     //¶¨ÒåÒ»¸öÊý×é
print_r(array_keys($array,"blue"));       //·µ»ØֵΪblueµÄ¼üÃû
//¶¨ÒåÒ»¸öÔªËØΪÊý×éµÄÊý×é
$array=array("color"=>array("blue","red","green"),"size"=>array("small","medium","large"));
print_r(array_keys($array));        //·µ»ØÊý×éµÄËùÓмüÃû

/*
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array_keys() º¯Êý·µ»Ø°üº¬Êý×éÖÐËùÓмüÃûµÄÒ»¸öÐÂÊý×é¡£

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Èç¹û strict ²ÎÊýÖ¸¶¨Îª true£¬Ôò php »áʹÓÃÈ«µÈ±È½Ï (===) À´Ñϸñ¼ì²é¼üÖµµÄÊý¾ÝÀàÐÍ¡£

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array_keys(array,value)