How to comment inside a string in PHP

Question

$var = "a b // I want to comment here but it becomes a string instead c"

I want to insert a comment in the middle of multiple line string in PHP, but I can't. I've tried /**/, //, and #.

Does anyone know how to do it?

It's important. To point out where the error lies for an SQL query string for example. — Aminah Nuraini
– Aminah Nuraini, Commented Apr 12, 2016 at 5:28
so then you can use SQL comment in php string like this SELECT * FROM orders -- comment WHERE p < 25 or you may use # instead of -- — Akshay Khale
– Akshay Khale, Commented Apr 12, 2016 at 5:33
That's helpful. Should make it into a different question post sometime. — Aminah Nuraini
– Aminah Nuraini, Commented Apr 12, 2016 at 5:35
@kungphu Sometimes complex queries are helped by inline comments. I know I have a tricky regex with comments in the string itself (using the x modifier to allow it and generous whitespace) — Niet the Dark Absol
– Niet the Dark Absol, Commented Apr 12, 2016 at 13:02

Prassd Nidode · Accepted Answer · 2016-04-12 12:09:46Z

11

$var = "a b ".// I want to comment here but it becomes a string instead." "c"; echo $var;

edited Apr 12, 2016 at 12:09

answered Apr 12, 2016 at 5:39

Prassd Nidode

3121 silver badge9 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Sebastian Mach Over a year ago

Ugh, that's not commenting within a string. Please at least clarify to the asker what you are doing, since as it is, it looks like you are promoting ".// as the "string commenting operator".

Prassd Nidode Over a year ago

if u know the answer for this then paste it..we will also get knw the correct answer

Sebastian Mach Over a year ago

The correct answer was given already. No need to be redundant. Why not edit your answer to make it better, instead of falling back to being miffed?

Frungi Over a year ago

@SebastianMach Bit late, but I just submitted an edit that was six years overdue. So hopefully that’s better and gets approved

Scopey · Accepted Answer · 2016-04-12 05:27:54Z

9

Only possible with concatenation and a comment:

$var = "a\n" . // "b\n" . "c";

answered Apr 12, 2016 at 5:27

Scopey

6,3191 gold badge24 silver badges34 bronze badges

2 Comments

RJParikh Over a year ago

This is not useful as its not printing "b". @Scopey

Scopey Over a year ago

Ha sorry I misunderstood the question, I thought the "b" wanted to be commented out. Accepted answer is the way i'd do this.

JiteshNK · Accepted Answer · 2016-04-12 05:43:36Z

2

you can also write your code like this. If you want multi line you can use \n at after string.

$string = 'First'; $string .= 'Comment section ';//this where you can comment $string .= 'Last';

answered Apr 12, 2016 at 5:43

JiteshNK

4282 silver badges11 bronze badges

2 Comments

Aminah Nuraini Over a year ago

Nice to know that. Finally, I know .= is possible.

JiteshNK Over a year ago

Yes, @Aminah Nuraini you can achieve your task with concatenation

RJParikh · Accepted Answer · 2016-04-12 05:55:50Z

<?php $var = "a\n" . "b\n" . //this where you can comment "c"; echo $var; ?>

Output

a b c

Check code and output in editor. Click Here

gal zakay · Accepted Answer · 2016-04-12 11:46:34Z

You got your answer but I thought I'll share my 2 cents as well: You could use the HTML comment tag:

<!--This is a comment. Comments are not displayed in the browser-->

The catch is that users can view this comment if they view source!

With the example you gave:

$var = "a b <!--I want to comment here but it becomes a string instead--> c";

And while we're at it, you can use /**/ inside Style tag(CSS):

.Class { width: 100%; /*The width*/ }

Or as someone already suggested just close the string and comment inside PHP:

$var = "a". "b". //Comment "c";

And if you want to maintain the new line:

$var = "a\n"

The first solution won't work if I the string as an SQL query

Collectives™ on Stack Overflow

How to comment inside a string in PHP

5 Answers 5

4 Comments

2 Comments

2 Comments

Comments

1 Comment

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

4 Comments

2 Comments

2 Comments

Comments

1 Comment

Related