这是一款简单的php 数组 查找实例，在数组中循环输出数组所有内容，并进来判断是否是我们要找的值并输出就ok了。
$q ='www.111cn.net';
$items = array(
great bittern=>botaurus stellaris,
little grebe=>tachybaptus ruficollis,
black-necked grebe=>podiceps教程 nigricollis,
little bittern=>ixobrychus minutus,
black-crowned night heron=>www.111cn.net,
www.111cn.net=>ardea purpurea,
white stork=>ciconia ciconia,
spoonbill=>platalea leucorodia,
red-crested pochard=>netta rufina,
common eider=>somateria mollissima,
red kite=>milvus milvus,
hen harrier=>circus cyaneus,
heuglin's gull=>larus heuglini
);
foreach ($items as $key=>$value) {
 if (strpos(strtolower($key), $q) !== false) {
  echo $key|$value ;
 }
}
//结果为www.111cn.net|ardea purpurea