《PHP實(shí)例：PHP中Array相關(guān)函數(shù)簡(jiǎn)介》要點(diǎn)：
本文介紹了PHP實(shí)例：PHP中Array相關(guān)函數(shù)簡(jiǎn)介，希望對(duì)您有用。如果有疑問(wèn)，可以聯(lián)系我們。
使用函數(shù)array_keys(),得到數(shù)組中所有的鍵,參數(shù)：數(shù)組PHP實(shí)戰(zhàn)
$arr=array(); $arr['one']="one"; $arr['two']="two"; $arr['three']="three"; $newArr=array_keys($arr); print_r($newArr); //Array ( [0] => one [1] => two [2] => three )
使用函數(shù)array_values(),得到數(shù)組中所有的值,參數(shù)：數(shù)組PHP實(shí)戰(zhàn)
$arr=array(); $arr[20]="one"; $arr[30]="two"; $arr[40]="three"; $newArr=array_values($arr); print_r($newArr); //Array ( [0] => one [1] => two [2] => three )
使用函數(shù)array_map(),使每個(gè)元素都調(diào)用一下自定義函數(shù),參數(shù)：String類(lèi)型函數(shù)名稱(chēng),數(shù)組PHP實(shí)戰(zhàn)
$arr=array();
$arr[0]="one";
$arr[1]="two";
$arr[2]="three";
function test($v){
return $v." Hello";
}
$newArr=array_map("test",$arr);
print_r($newArr);
//Array ( [0] => one Hello [1] => two Hello [2] => three Hello )
使用函數(shù)array_merge(),把兩個(gè)數(shù)組合并成一個(gè),參數(shù)：數(shù)組,數(shù)組PHP實(shí)戰(zhàn)
關(guān)聯(lián)數(shù)組合并時(shí),鍵相同的會(huì)被后面的數(shù)組覆蓋PHP實(shí)戰(zhàn)
索引數(shù)組合并時(shí),會(huì)連接在一起形成一個(gè)新的數(shù)組PHP實(shí)戰(zhàn)
$arr=array();
$arr[0]="one";
$arr[1]="two";
$arr[2]="three";
$arr1=array();
$arr[3]="taoshihan1";
$arr[4]="taoshihan2";
$arr[5]="taoshihan3";
$newArr=array_merge($arr,$arr1);
print_r($newArr);
//Array ( [0] => one [1] => two [2] => three [3] => taoshihan1 [4] => taoshihan2 [5] => taoshihan3 )
$arr=array("one","two","three");
$arr1=array("4","5","6");
$newArr=array_merge($arr,$arr1);
print_r($newArr);
//Array ( [0] => one [1] => two [2] => three [3] => 4 [4] => 5 [5] => 6 )
使用函數(shù)ksort(),按照鍵名進(jìn)行排序,注意沒(méi)有返回新的數(shù)組,還是原來(lái)的數(shù)組PHP實(shí)戰(zhàn)
$arr=array("2"=>"taoshihan2","1"=>"taoshihan1","3"=>"taoshihan3");
ksort($arr);
print_r($arr);
//Array ( [1] => taoshihan1 [2] => taoshihan2 [3] => taoshihan3 )
使用函數(shù)array_search(),搜索某個(gè)鍵值,返回對(duì)應(yīng)的鍵PHP實(shí)戰(zhàn)
$arr=array("2"=>"taoshihan2","1"=>"taoshihan1","3"=>"taoshihan3");
echo array_search("taoshihan1",$arr);
// 1
?PHP實(shí)戰(zhàn)
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