(PHP 5 >= 5.1.0)
array_diff_key — ･ｭ｡ｼ､爨ﾋ､ｷ､ﾆﾇﾛﾎﾎｺｹ､ﾗｻｻ､ｹ､�
array1 ､ﾎ･ｭ｡ｼ､� array2 ､ﾎ･ｭ｡ｼ､ﾈﾈ豕ﾓ､ｷ｡｢､ｽ､ﾎｺｹ､ﾖ､ｷ､ﾞ､ｹ｡｣ ､ｳ､ﾎｴﾘｿﾏ array_diff() ､ﾋｻﾆ､､､ﾞ､ｹ､ｬ｡｢ ﾃﾍ､ﾇ､ﾏ､ﾊ､ｯ･ｭ｡ｼ､ﾑ､､､ﾆﾈ豕ﾓ､ｹ､�ﾈ､､､ｦﾅﾀ､ｬｰﾛ､ﾊ､熙ﾞ､ｹ｡｣
ﾈ豕ﾓｸｵ､ﾎﾇﾛﾎ｣
ﾈ豕ﾓ､ｹ､�ﾐｾﾝ､ﾈ､ﾊ､�ﾛﾎ｣
､ｵ､鬢ﾋﾈ豕ﾓ､ｹ､�ﾐｾﾝ､ﾈ､ﾊ､�ﾛﾎ｣
array1 ､ﾎﾍﾗﾁﾇ､ﾎ､ｦ､ﾁ｡｢ ､ｽ､ﾎﾂｾ､ﾎﾇﾛﾎﾎ､､､ｺ､�ﾋ､箒ﾞ､ﾞ､�ﾊ､､･ｭ｡ｼ､ﾎ､筅ﾎ､ﾀ､ｱ､ﾄ､ｷ､ｿﾇﾛﾎﾖ､ｷ､ﾞ､ｹ｡｣
ﾎ�1 array_diff_key() ､ﾎﾎ�
､ﾕ､ｿ､ﾄ､ﾎ key => value ､ﾎ･ﾚ･｢､ｬﾅｷ､､､ﾈ､ﾟ､ﾊ､ｵ､��ﾎ､ﾏ｡｢ (string) $key1 === (string) $key2 ､ﾇ､｢､��遉ﾎ､ﾟ､ﾇ､ｹ｡｣､ﾄ､ﾞ､遙｢ｸｷﾌｩ､ﾊｷｿ･ﾁ･ｧ･ﾃ･ｯ､ﾔ､ｦ､ﾈ､､､ｦ､ｳ､ﾈ､ﾇ､ｹ｡｣ ﾊｸｻ昀ｽｸｽ､ｬｰ�ﾗ､ｷ､ﾊ､ｱ､�ﾐ､ﾊ､熙ﾞ､ｻ､｣
<?php
$array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8);
var_dump(array_diff_key($array1, $array2));
?>
ｾ螟ﾎﾎ网ﾎｽﾐﾎﾏ､ﾏｰﾊｲｼ､ﾈ､ﾊ､熙ﾞ､ｹ｡｣
array(2) {
["red"]=>
int(2)
["purple"]=>
int(4)
}
ﾃ擎ﾕ:
､ｳ､ﾎｴﾘｿﾏ n ｼ｡ｸｵﾇﾛﾎﾎｰ�ﾄ､ﾎｼ｡ｸｵ､ｷ､ｫ･ﾁ･ｧ･ﾃ･ｯ､ｷ､ﾞ､ｻ､｣ ､筅ﾁ､惕｢array_diff_key($array1[0], $array2[0]); ､ﾎ､隍ｦ､ﾋ､ｹ､�ｳ､ﾈ､ﾇ､隍�ｼ､､ｼ｡ｸｵ､ﾇ､ﾎ･ﾁ･ｧ･ﾃ･ｯ､筅ﾇ､ｭ､ﾞ､ｹ｡｣