PHP 常用数组的具体运用？常用吗？

在 php 中，有三种类型的数组：

看具体实例：

创建数组

<?php    //方式 1    $cars = array("volvo","bmw","toyota");    //方式 2    $cars[0] = "volvo";    $cars[1] = "bmw";    $cars[2] = "toyota";    //方式 3    $cars = [      "volvo",      "bmw",      "toyota",    ]?><?php    $cars = array("volvo","bmw","toyota");    echo "i like " . $cars[0] . ", " . $cars[1] . " and " . $cars[2] . ".";?>

获取数组的长度 – count () 函数

<?php   $cars = array("volvo","bmw","toyota");    echo count($cars);?>

遍历数组

<?php    $cars = array("volvo","bmw","toyota");  //第一种方式    $arrlength = count($cars);    for($x = 0 ;$x < $arrlength ;$x++) {        echo $cars[$x];        echo "<br>";    }    //第二种方式    foreach ($cars as $key => $value){        echo $value;        echo "<br/>";    }?>

array_chunk () 函数 (把数组分割为带有两个元素的数组块)

<?php    $cars = array("volvo","bmw","toyota","honda","mercedes","opel");    print_r(array_chunk($cars,2));?>

array_keys () 函数 (返回包含数组中所有键名的一个新数组)

<?php    $a = array("volvo"=>"xc90","bmw"=>"x5","toyota"=10首清明节的古诗>"highlander");    print_r(array_keys($a));?>

array_push () 函数 (向数组尾部插入 “blue” 和 “yellow”)

<?php    $a = array("red","green");    array_push($a,"blue","yellow");    print_移动商务r($a);?>

array_pop () 函数 (删除数组中的最后一个元素)

<?php    $a = array("red","green","blue");    array_pop($a);    print_r($a);?>

array_rever () 函数 (返回翻转顺序的数组)

<?php    $左脑右脑测试a = array("a"=>"volvo","b"=>"bmw","c"=>"toyota");    print_r(array_rever($a));?>

sort () 函数 (对数组中的元素按字母进行升序排序)

<?php    $cars = array("volvo","bmw","toyota");    sort($cars);?>