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@shinichi-takii(Shinichi Takii)

PHP isset, empty, is_null の違い早見表

PHP

Last updated at 2016-06-22Posted at 2016-06-22

PHP isset, empty, is_null の違い早見表

値	if($var)	isset	empty	is_null
$var=1	true	true	false	false
$var="";	false	true	true	false
$var="0";	false	true	true	false
$var=0;	false	true	true	false
$var=NULL;	false	false	true	true
$var	false	false	true	true
$var=array()	false	true	true	false
$var=array(1)	true	true	false	false

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