Created
March 22, 2012 11:33
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配列か連想配列か判定する ref: http://qiita.com/items/721cc3a385cb2d7daebd
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<?php | |
if (array_values($arr) === $arr) { | |
echo '$arrは配列'; | |
} else { | |
echo '$arrは連想配列'; | |
} |
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<?php | |
/** | |
* 添え字が0から連続する数値(=配列とみなせる)ときにtrue | |
*/ | |
function is_vector(array $arr) { | |
return array_values($arr) === $arr; | |
} | |
$arr1 = array('a','b','c'); //配列 | |
$arr2 = array('a'=>'a', 'b'=>'b'); //添字が文字なので配列とは言えない | |
$arr3 = array('a', 2=>'b', 1=>'c'); //添え字の順番がおかしいので配列とは言えない | |
var_dump(is_vector($arr1)); //true | |
var_dump(is_vector($arr2)); //false | |
var_dump(is_vector($arr3)); //false |
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