PHP-使用数组的示例 全球今头条

$myArray1 = array(1, 2, 3);echo $myArray1[0]; // 输出：1echo $myArray1[1]; // 输出：2echo $myArray1[2]; // 输出：3

$myArray2 = array(    "Alice" => 95,    "Bob" => 87,    "Charlie" => 92);echo $myArray2["Alice"]; // 输出：95echo $myArray2["Bob"]; // 输出：87echo $myArray2["Charlie"]; // 输出：92

$myArray3 = array(    "Alice" => array(        "Math" => 95,        "English" => 92    ),    "Bob" => array(        "Math" => 87,        "English" => 90    ),    "Charlie" => array(        "Math" => 92,        "English" => 88    ));echo $myArray3["Alice"]["Math"]; // 输出：95echo $myArray3["Bob"]["English"]; // 输出：90echo $myArray3["Charlie"]["Math"]; // 输出：92

$myArray4 = array(4, 5, 6);$mergedArray1 = array_merge($myArray1, $myArray4); // 合并两个索引数组print_r($mergedArray1); // 输出：Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 )

$myArray5 = array(    "David" => 89,    "Eva" => 91);$mergedArray2 = array_merge($myArray2, $myArray5); // 合并两个关联数组print_r($mergedArray2); // 输出：Array ( [Alice] => 95 [Charlie] => 92 [David] => 89 [Eva] => 91 )

array_push($myArray1, 4, 5); // 向索引数组中添加两个元素print_r($myArray1); // 输出：Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 )

array_pop($myArray1); // 从索引数组中删除最后一个元素print_r($myArray1); // 输出：Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 )

array_shift($myArray1); // 从索引数组中删除第一个元素print_r($myArray1); // 输出：Array ( [0] => 2 [1] => 3 [2] => 4 )

array_unshift($myArray1, 0); // 向索引数组开头添加一个元素print_r($myArray1); // 输出：Array ( [0] => 0 [1] => 2 [2] => 3 [3] => 4 )