Keyword Analysis & Research: php check variable is null

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
php check variable is null	1.08	0.1	1241	54	26
php	0.83	0.3	3166	81	3
check	0.38	0.6	7416	38	5
variable	0.59	0.5	9951	23	8
is	1.43	0.7	4838	45	2
null	0.19	0.4	716	82	4

Keyword	CPC	PCC	Volume	Score
php check variable is null	0.01	0.9	6013	32
php check if variable is null	1.82	0.4	9148	36
php check if variable is null or empty	1.17	1	8306	14