Expand PHP functions in strings just like variables

Question

In PHP I can say

$noun = "bird";
$adjective = "warm;
echo <<<EOT
The $noun is very $adjective
EOT;

and it will output

The bird is very warm

Is there a way to do this with functions?

function getNoun() { return "bird"; }
function getAdjective() { return "warm"; }
echo <<<EOT
The getNoun() is very getAdjective()
EOT;

and output

The bird is very warm

I am building a set of blogging API and I want to have a makeLink(anchor, target, format) function and put it inside of a herdoc. It has to be a heredoc string because it has multiple quotes and apostrophes. I would like it if i could embed a function in a heredoc, not just for links, but tables, pictures, posts, I think its cleaner and more readable to use an aptly named function that writes out the HTML for you than just ambiguous HTML. makePost("About HTML", "By ME", "Lorem Ipsum...,"); is so much more meaningful then <div id="post"><div id="title"><h1>AboutHTML</h1><h2>By ME</h2></div ... — charmoniumQ
– charmoniumQ, Commented Dec 13, 2011 at 4:55
Please show the code what you've done so far, probably we can help with a concrete problem of your parser. — hakre
– hakre, Commented Dec 13, 2011 at 8:03

gen_Eric · Accepted Answer · 2011-12-02 21:09:27Z

5

You can use variable functions, though they're rather frowned on upon as they're not far different from variable variables...

$a = 'getNoun';
$b = 'getAdjective';
echo <<<EOT
The {$a()} is very {$b()}
EOT;

edited Dec 2, 2011 at 21:09

gen_Eric

228k42 gold badges304 silver badges343 bronze badges

answered Dec 2, 2011 at 21:04

Marc B

362k44 gold badges433 silver badges508 bronze badges

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

Comments

Benjam · Accepted Answer · 2011-12-02 21:22:03Z

2

You could store it in a variable before using it:

$noun = getNoun( );
$adj = getAdjective( );
echo <<<EOT
    The {$noun} is very {$adj}
EOT;

edited Dec 2, 2011 at 21:22

answered Dec 2, 2011 at 21:01

Benjam

5,3663 gold badges31 silver badges37 bronze badges

Comments

Andrew Rasmussen · Accepted Answer · 2011-12-02 21:04:00Z

0

echo "The ";
echo getNoun();
echo " is very ";
echo getVerb();

Or maybe even (not 100% sure):

echo "The " . getNoun() . " is very " . getVerb();

answered Dec 2, 2011 at 21:04

Andrew Rasmussen

15.2k10 gold badges47 silver badges84 bronze badges

Comments

Tim Withers · Accepted Answer · 2011-12-02 21:16:21Z

0

Here is a solution using variable functions, although not exactly:

$noun=function($type){
    return $type;
};
$adjective=function($adj){
    return $adj;
};
echo "{$noun("Robin")} was very {$adjective("Warm")}";

answered Dec 2, 2011 at 21:16

Tim Withers

12.1k5 gold badges45 silver badges68 bronze badges

Collectives™ on Stack Overflow

Expand PHP functions in strings just like variables

4 Answers 4

Comments

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related