Puttin info in a javascript using PHP.

[jwk811]

I need to make an array of content which I will get from the database to put into the javascript. How? If I use AJAX, how?

[premiso]

json_encode

 

That would be the best way.

 

I would also recommend using jQuery (do a google for it). It makes AJAX a ton easier to do, and has examples!

[jwk811]

json_encode

 

That would be the best way.

 

I would also recommend using jQuery (do a google for it). It makes AJAX a ton easier to do, and has examples!

doesnt work with php 4

[premiso]

Better to code for the future, I would add this in one of your included pages

 

<?php
if (!function_exists('json_encode'))
{
  function json_encode($a=false)
  {
    if (is_null($a)) return 'null';
    if ($a === false) return 'false';
    if ($a === true) return 'true';
    if (is_scalar($a))
    {
      if (is_float($a))
      {
        // Always use "." for floats.
        return floatval(str_replace(",", ".", strval($a)));
      }

      if (is_string($a))
      {
        static $jsonReplaces = array(array("\\", "/", "\n", "\t", "\r", "\b", "\f", '"'), array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"'));
        return '"' . str_replace($jsonReplaces[0], $jsonReplaces[1], $a) . '"';
      }
      else
        return $a;
    }
    $isList = true;
    for ($i = 0, reset($a); $i < count($a); $i++, next($a))
    {
      if (key($a) !== $i)
      {
        $isList = false;
        break;
      }
    }
    $result = array();
    if ($isList)
    {
      foreach ($a as $v) $result[] = json_encode($v);
      return '[' . join(',', $result) . ']';
    }
    else
    {
      foreach ($a as $k => $v) $result[] = json_encode($k).':'.json_encode($v);
      return '{' . join(',', $result) . '}';
    }
  }
}
?>

 

That will do the exact thing that json_encode does, and you can use the same name. Then when you upgrade to PHP5 all your code should still work without having to change it.

[jwk811]

Better to code for the future, I would add this in one of your included pages

 

<?php
if (!function_exists('json_encode'))
{
  function json_encode($a=false)
  {
    if (is_null($a)) return 'null';
    if ($a === false) return 'false';
    if ($a === true) return 'true';
    if (is_scalar($a))
    {
      if (is_float($a))
      {
        // Always use "." for floats.
        return floatval(str_replace(",", ".", strval($a)));
      }

      if (is_string($a))
      {
        static $jsonReplaces = array(array("\\", "/", "\n", "\t", "\r", "\b", "\f", '"'), array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"'));
        return '"' . str_replace($jsonReplaces[0], $jsonReplaces[1], $a) . '"';
      }
      else
        return $a;
    }
    $isList = true;
    for ($i = 0, reset($a); $i < count($a); $i++, next($a))
    {
      if (key($a) !== $i)
      {
        $isList = false;
        break;
      }
    }
    $result = array();
    if ($isList)
    {
      foreach ($a as $v) $result[] = json_encode($v);
      return '[' . join(',', $result) . ']';
    }
    else
    {
      foreach ($a as $k => $v) $result[] = json_encode($k).':'.json_encode($v);
      return '{' . join(',', $result) . '}';
    }
  }
}
?>

 

That will do the exact thing that json_encode does, and you can use the same name. Then when you upgrade to PHP5 all your code should still work without having to change it.

nice thank you, i looked up the function but i still don't understand how to use it.

[premiso]

Read up on AJAX. You would create a page then populate an array, then echo the array after it has been json_enocoded'd.

 

I would point you to jQuery, google that it makes AJAX a ton easier, plus you are likely to find some really good, clean examples of how to use it.