PHP Script to load fonts as needed

I'm looking for a way to add fonts on an 'as-needed' basis.

I originally had 4 Google API Fonts chosen from when I build this particular site. Now that it's grown, I'd like to up the font selection to 9 choices.

I'm trying to figure out a way to get this done via PHP, but I'm a designer so my php is 'eh'.

Here's the "rough draft" from what I know of php.

Anybody want to help me out real quick?

<?php //This is in an External PHP Command Page
$aladin = "Aladin";
$cardo = "Cardo:400,400italic";
$crimson = "Crimson+Text:700italic";
$euphoria = "Euphoria+Script";
$josefin = "Josefin+Slab:400,700";
$philosopher = "Philosopher:400,400italic";
$redressed = "Redressed";
$rouge = "Rouge+Script";
$vollkorn = "Vollkorn:400,400italic,700";

//Factory Presets
$all = "$aladin, $cardo, $crimson, $euphoria, $josefin, $philosopher, $redressed, $rouge, $vollkorn";
$main = "$cardo, $crimson, $philosopher,";

    function insertFonts ($fonts) {
        echo '<link href=\"//fonts.googleapis.com/css?family=';
        echo $fonts;
        echo '\' rel="stylesheet" type="text/css" />';  
        };
?>

Then this in the web page.

<?php //This goes inside the <head> of X page
insertFonts($main); // OR insertFonts($aladin, $redressed, $euphoria); as needed
?>

Thanks!

Solution

function insertFonts($f){
    $output = '';
    $fonts = array(
        'aladin'        =>  "Aladin",
        'cardo'         =>  "Cardo:400,400italic",
        'crimson'       =>  "Crimson+Text",
        'euphoria'      =>  "Euphoria+Script",
        'josefin'       =>  "Josefin+Slab, serif",
        'philosopher'   =>  "Philosopher, italic",
        'redressed'     =>  "Redressed, cursive",
        'rouge'         =>  "Rouge+Script, cursive",
        'vollkorn'      =>  "Vollkorn, serif"
    );

foreach ($f as $val) {
    if(array_key_exists($val, $fonts)){
        if(strlen($output)>0) $output .="|";
        $output .="$fonts[$val]";
    }
}
return strlen($output)>0 ? "<link href=\"//fonts.googleapis.com/css?family=$output\" rel='stylesheet' type='text/css' />" : '';
}

// Usage
echo insertFonts(array('cardo','josefin'));

But if you want to load each fonts seperatey, change the method this way:

foreach ($f as $val) {
    if(array_key_exists($val, $fonts)){
        $output .="<link href=\"//fonts.googleapis.com/css?family=$fonts[$val]\" rel='stylesheet' type='text/css' />\n";
    }
}

return $output;