How to show different css on different pages?

Question

Like for user page different css, for question page different css etc.

Answer 1

{if ( $this->template=='question' )

    $this->output('<link rel="stylesheet" href="../qa-theme/cssforquestion.css"/>');

  else

  $this->output('<link rel="stylesheet" href="../qa-theme/csshome.css"/>');

  }

Comments

Where do I apply it?

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in qa-theme-base

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Shall I reset this code? Or will I replace the previous code?

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Override the method head_css() in your theme (in the file qa-theme.php). If you modify qa-theme-base.php your changes will be lost when you update Q2A, so you'd have to make them again.