标签:key fun foreach cti abc 添加 数组去重 value 循环
//参数默认值
//function abc($a,$b,$c = 0){
// echo $a,$b,$c;
//}
//abc(1,3);
//结果等于130;
//echo "<br>";
//竖着看的代码;
//echo "<pre>";
//function def(){
// $arr = func_get_args();
// var_dump($arr);
//}
//def(1,2,3,4,5);
//数组定义
//两种定义方法
//$arr1 = [];
//$arr2 = array();
//索引数组-
//$arr1 = [1,2,3,"abc",1,2,3];
//关联数组,最后一个不加逗号。one是key,1是value;
//$arr2 = [
// "one" => 1,
// "two" => 2,
// "three" => 3
//];
//echo $arr2["one"];
//数组方法
//弹出来东西
//array_pop($arr2);
//添加元素,返回索引值
//array_push($arr2,"xyz");
//echo "<pre>";
//var_dump($arr2);
//echo "<pre>";
//长度
//count($arr2);
//echo count($arr2);
//判断数组是否有某个值
//in_array("1",$arr2);
//var_dump(in_array("1111",$arr2));
//合并数组
//$arr3 = array_merge($arr1,$arr2);
//var_dump($arr3);
//数组反转
//$arr4 = array_reverse($arr2);
//var_dump($arr4);
//数组去重
//$arr5 = array_unique($arr1);
//var_dump($arr5);
//删除数组中的某个元素
//unset($arr1[0]);
//var_dump($arr1);
//遍历数组
$arr1 = [1,2,3,4,5,6,7];
$arr2 = [
"one" => 1,
"two" => 2,
"three" =>3,
"four" =>4
];
//for循环
//for($i = 0;$i < count($arr1);$i++){
// var_dump($arr1[$i]);
//}
//foreach遍历,此处value为命名,可更改。
//foreach ($arr2 as $value){
// var_dump($value);
//}
//此处key和value为命名,可更改,下面做出相应更改即可。
//foreach($arr2 as $key=>$value){
// echo $key;
// echo "-----";
// echo $value;
// echo "<br>";
//}
//指针遍历
//echo "<pre>";
//var_dump(each($arr2));
标签:key fun foreach cti abc 添加 数组去重 value 循环
原文地址:http://www.cnblogs.com/GP1014336455/p/7600923.html