php replace first 2 characters of string

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
php replace first 2 characters of string	1.23	0.6	446	31	40
php	0.83	0.2	2757	61	3
replace	1.97	0.8	5619	3	7
first	0.61	0.8	1546	28	5
2	1.05	0.2	1500	9	1
characters	0.8	0.4	9723	35	10
of	0.57	0.5	2818	64	2
string	1.12	1	3266	16	6

Keyword	CPC	PCC	Volume	Score
php replace first 2 characters of string	0.21	1	7878	70
php replace string characters	1.75	0.6	3345	98
php replace multiple characters in string	1.48	1	7194	79
php replace first character	1.41	0.9	9338	77
replace a character in a string php	1.83	0.7	6490	32
replace specific character in string php	1.01	0.6	3409	71
php replace char in string	0.79	0.1	2703	48
php replace string in string	1.86	0.8	9032	96
replace multiple characters in php	1.42	1	25	67
php replace all in string	0.18	0.6	622	89
replace string in php	0.62	0.9	661	33
php string replace multiple	1.42	0.4	9163	22
php replace multiple words in string	1.63	0.7	7427	93
replace special characters in php	1.27	0.5	7295	45
string replace multiple characters	0.26	0.3	3654	92
string replace multiple characters javascript	1.61	0.4	18	75