Keyword Analysis & Research: correct way to add a comment in php

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
correct way to add a comment in php	0.16	0.7	6805	27	35
correct	0.65	0.9	7371	61	7
way	0.55	0.5	9804	5	3
to	1.76	0.2	8597	42	2
add	0.7	0.4	9273	59	3
a	0.88	0.7	7288	90	1
comment	0.97	1	8805	82	7
in	1.48	0.2	9318	74	2
php	1.32	1	5911	16	3

Keyword	CPC	PCC	Volume	Score
correct way to add a comment in php	0.85	0.4	6321	92
what is a correct way to add a comment in php	1.15	1	1309	38
how to write a comment in php	0.61	0.6	9584	15
how to comment in php code	1.81	0.3	180	47
php how to comment	1.58	1	2389	10
how to use comments in php	0.8	0.3	8968	17
how to give comments in php	1.07	0.7	6622	50
writing comments in php	1.09	0.3	1753	30