Question

How to write the following in PHP:

IF current page’s name is pagex.php
THEN please load these additional CSS rules:
#DIVS { color:#FFF }
IF current page’s name is anotherpage.php
THEN please load following CSS rules:
#DIVS { color: #000 }

Answer 1

PHP has some “magic constants” that you can inspect to get this information. Take a look at the ` __FILE__ constant.

The full path and filename of the file. If used inside an include, the name of the included file is returned. Since PHP 4.0.2, FILE always contains an absolute path with symlinks resolved whereas in older versions it contained relative path under some circumstances.

So you can take this __FILE__ variable and execute the basename() function on it to get the file name. The basename() function returns the trailing name component of a path. Then you simply do a switch case to match the desired value –

$fileName = basename(__FILE__);
switch($fileName){
  case 'pagex.php':
    echo '<link .... src="some_stylesheet_file.css" />';
    break;
  case 'anotherpage.php':
    echo '<link .... src="another_stylesheet_file.css" />';
    break;
}

Your additional CSS rules can sit within those separate files.

Alternatively, if you don’t want to split your css into multiple files, you can echo those specific rules into your page’s head element like this –

echo '<style type="text/css">';
$fileName = basename(__FILE__);
switch($fileName){
  case 'pagex.php':
    echo '#DIVS { color:#FFF }';
    break;
  case 'anotherpage.php':
    echo '#DIVS { color: #000 }';
    break;
} 
echo '</style>';

---

References –

• basename()
• php magic constants