php 插入数组

<?php
$array = array("apple", "banana");
array_push($array, "cherry", "date");
print_r($array);
?>

<?php
$array = array("apple", "banana");
array_unshift($array, "cherry", "date");
print_r($array);
?>

<?php
$array = array();
$array[0] = "apple";
$array[1] = "banana";
$array[2] = "cherry";
print_r($array);
?>

<?php
$array = array();
$array["fruit1"] = "apple";
$array["fruit2"] = "banana";
$array["fruit3"] = "cherry";
print_r($array);
?>

<?php
$array = array(); // 确保数组已初始化
$array[] = "apple"; // 使用空索引自动分配
$array[] = "banana";
print_r($array);
?>

<?php
$array = array("fruit1" => "apple");
$array["fruit1"] = "banana"; // 覆盖原有值
$array["fruit2"] = "cherry"; // 添加新键值对
print_r($array);
?>