配列と変数の変換

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「5.6配列と変数の変換」からのメモ。

  • extract()を使って連想配列をキーを変数名として展開する
<?php
$hoge = array("first" => "a" , "second" => "b" , "third" => "c");
extract($hoge , EXTR_PREFIX_ALL , "hoge");
echo "\$hoge_first = $hoge_first\n";
echo "\$hoge_second = $hoge_second\n";
echo "\$hoge_third = $hoge_third\n";
?>

$hoge_first = a
$hoge_second = b
$hoge_third = c

EXTR_PREFIX_ALLはEXTRA_PREFIX_ALLでないことに注意。

  • compact()を使って、変数名をキーとした連想配列の作成
<?php
$first = "a";
$second = "b";
$third = "c";
$hoge = compact("first" , "second" , "third");
print_r($hoge);
?>

Array
(
    [first] => a
    [second] => b
    [third] => c
)