Easy title/keyword tags

**chrisguk** · 04-15-2012 02:27 PM

Originally Posted by NogDog

I might do something like this (or I might not

):

PHP Code:


<?php

/**

 * Get HTML text for title element plus keywords and description meta tags

 * @return string

 * @param string $pageName Top-level key in $data array

 */

function getHtmlHead($pageName="default")

{

   $data = array(

      "default" => array(

         "title" => "Default Title",

         "keywords" => array(

            "word1",

            "word2"

         ),

         "description" => "This is a sample description."

      ),

      "index" => array(

         "title" => "Home",

         "keywords" => array(

            "foo",

            "bar"

         ),

         "description" => "Welcome to the home page."

      ),

      "schedule" => array(

         "title" => "Schedule",

         "keywords" => array(

            "Larry",

            "Moe",

            "Curly"

         ),

         "description" => "This is the schedule page."

      )

   );

   if( ! array_key_exists($pageName, $data)) {

      $pageName = "default";

      error_log("Invalid pageName '$pageName' in ".__FUNCTION__."()");

   }

   $template = <<<EOD

<html>

<head>

<title>%s</title>

<meta name='keywords' content='%s' />

<meta name='description' content='%s' />

</head>

<body>



EOD;



   return sprintf(

      $template,

      htmlspecialchars($data[$pageName]['title']),

      htmlspecialcahrs(implode(', ', $data[$pageName]['keywords'])),

      htmlspecialchars($data[$pageName]['description'])

   );

}

Usage:

PHP Code:


<?php

require_once 'path/to/the/above/file.php';

echo getMetaTags('schedule');

?>

<div>Main content here...</div>

Hi NogDog,

A belated question/reply to this thread but I wanted to ask you something about the solution you provided.

Basically I am using what some people describe as an ungly case/switch method within my index.php gile to switch the title tags etc etc.

Your method looks nice and I wondered if there are any performance implications using a nested array?

**LaffinToo** · 04-16-2012 06:34 PM

I think you will find the performance neglible.
a switch/case & if/else will create code like

Code:

    move AX,VariableA
    compare AX, ConstantA
    jumpnotequal Compare2
    move ax, Data1
    jump done
Compare2:
    compare AX, ConstantB
    jumpnotequal, Compare3
    move ax, Data2
    jump done
...
...

while an array system will reuse the comparison routine

Code:

   move AX, VariableA
   MOV DX, ArrayConstant
   move IX, 0
Compare1:
   Compare [DX+IX], AX
   jumpequal done
   Increment IX
   jump Compare1
done:
.
.
.

Although the use of the array shortens the amount of code produced, it does have the slight overhead of the math to calculate the position of the next element. The code snippets are pseudo code, and very simplified, but it's just to give an idea of what is produced by the interpreter/compiler.

For myself, I prefer using an array system. Because it keeps code more compact. When you been around for awhile and see if/else...switch/case statements hitting 30-50 blocks. and trying to fix/update the code becomes a chore.

My rule of thumb is never to use more than 3-5 if/else...switch/case statements. At this point consider using an array system.

New coders often find using arrays difficult so postpone learning them.

Anyways good luck on yer coding

**NogDog** · 04-16-2012 06:58 PM

Another good rule of thumb is to code for maintainability first, and worry about performance only if and when you find that you have to. (More often than not, your main performance bottlenecks will be the database, not your PHP code -- unless it's really, really awful

). That's not to say you shouldn't think about code efficiency at all, but I'd rather worry about saving hours of debugging versus microseconds of performance.

**jdavid** · 04-17-2012 01:08 AM

To all,
Great work. You all have given very valuable information
Thank You

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