[SOLVED] calling a function in the middle of non-php code block

[qhiiyr]

Hello, I am trying to write a function that reads a block of HTML. There are certain cues in the HTML that the function will replace with certain things (like a template).

 

So far I've got that down, but I have a problem. There's a keyword that I want to replace with the call to a function, instead of just a variable. So like, for example, if the keyword was "apple", and I had the HTML code block

 

I really would like an apple right now.

 

then PHP would print out "I really would like an ", and then call the function I want it to call, and then print out " right now."

 

I could do a str_replace() to replace the keyword ("apple") with the function call, and then just do an eval() on the whole block, but I don't want the block to be able to execute PHP code of its own.

 

Any hints as to how I might go about this? Any help is appreciated.

[trq]

Any hints as to how I might go about this? Any help is appreciated.

 

Really depends on how your parser works already. It could be as simple as....

 

<?php

  function foo() {
    return "banana";
  }

  $s = "I really would like an apple right now.\n";

  echo str_replace('apple', foo(), $s);

?>

[qhiiyr]

Oh wow, I had no idea you could call a function inside a str_replace(). Thanks a bunch! One question though, in your example, let's say you were to change it to

 

<?php

  function foo() {
    return "banana";
  }

  $s = "I really would like an apple right now.\n";

  $code = str_replace('apple', foo(), $s);

  /* some other code */

  echo $code;

?>

 

Would foo() get called during the str_replace, or not until $code gets echoed? I need it to not be called until the code is printed out.

[.josh]

foo would be called first.  Then str_replace will be parsed and the result assigned to $code.  Then whatever the result is will be echoed.

[qhiiyr]

Crap. Is there any simple way to make foo not be called until the code is printed?

[.josh]

Well, we're going to have to move from example code to your real code to figure that one out, because as it stands right now in the example code, the echo is already happening right after the whole str_replace/foo() thing.

[CroNiX]

Crap. Is there any simple way to make foo not be called until the code is printed?

Why does it matter?  The result will be the same...

[trq]

We really need to see how your implimenting this template engine / performance hog, but output buffering might assist.

 

[qhiiyr]

Sorry for the long response time, but I think I found a workaround. That suggestion to use my function inside the str_replace really helped. Thanks a bunch for the help, guys!