php check is string

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
php check is string	1.27	0.7	8666	4	19
php	0.2	0.4	2250	77	3
check	0.34	0.8	6363	28	5
is	0.84	0.8	1875	47	2
string	0.09	0.8	3142	47	6

Keyword	CPC	PCC	Volume	Score
php check is string	1.34	0.7	4632	13
php check is integer	1.67	0.9	4750	60
php check if string is empty	1.11	0.5	9469	12
php check if string is number	1.33	0.9	1993	84
php check if string is integer	0.01	0.8	4452	56
check if string is url in php	0.13	0.8	3856	22
how to check length of string in php	0.12	0.5	2329	42
how to check string contains in php	0.28	0.1	4070	26
php check if integer	0.98	0.7	7184	71
php check if number is integer or float	1.24	0.7	4327	6
php check variable is integer	1.21	0.2	2574	73
php check if value is integer	1.44	0.6	5436	86