【PHP】配列・連想配列・多次元配列の分割代入をする方法

[$variable, $variable] = array;

<?php
$arr = ['a', 'b', 'c'];
[$str1, $str2, $str3] = $arr;

print_r($str1); // a
print_r($str2); // b
print_r($str3); // c

[$str1, $str2, $str3, $str4] = $arr;

print_r($str4); // Warning: Undefined array key 3

[$str1, $str2] = $arr;

print_r($str1); // a
print_r($str2); // b

<?php
$str = ['a', 'b', ['c', 'd'], ['e', 'f']];
[$str1, $str2, $str3, $str4] = $str;

print_r($str1); // a
print_r($str2); // b
print_r($str3); // Array ( [0] => c  => d )
print_r($str4); // Array ( [0] => e  => f )

<?php
$str = ['a', 'b', ['c', 'd'], ['e', 'f']];
[$str1, $str2, [$str3, $str4]] = $str;

print_r($str1); // a
print_r($str2); // b
print_r($str3); // c
print_r($str4); // d

['key' => $variable, 'key' => $variable] = array;

<?php
$person = ['name' => 'Taro', 'age' => 20];
['name' => $name1, 'age' => $age1] = $person;

print_r($name1); // Taro
print_r($age1); // 20

['gender' => $gender1] = $person;

print_r($gender1); // Warning: Undefined array key "gender"