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Question

Insert Values after Compiler has passed Line

Answer 1

A:

Like you say, without using JavaScript or the like, I cant see how this would be possible, unless you let your php file run and instead of echoing the output, store it in a variable and go back and insert whatever in the head later.

Chief17 2010-06-14 18:50:10

Answer 2

+1 A:

http://php.net/manual/en/function.ob-start.php

Example #1 describes exactly what you're trying to do: You could create a callback function called when you call ob_end_flush().

For instance:

<?php
function replaceJS($buffer) {
  return str_replace("{JS_LIBS}", 'the value you want to insert', $buffer);
}
ob_start("replaceJS");
?>
<head>
<script>
{JS_LIBS}
</script>
</head>
<?php
ob_end_flush();
?>

The output in that case would be:

<head>
<script>
the value you want to insert
</script>
</head>

Maurice Kherlakian 2010-06-14 18:55:23

This solution worked pretty easily. Thanks

2010-06-16 00:40:33

Answer 3

A:

One option, would be to add a "marker". So replace //Enter More Code Here Later with .

Then, later on, when you're ready to send to the client (You mentioned using ob_flush()), simply do:

$headContent = ''; //This holds everything you want to add to the head
$html = ob_get_clean();
$html = str_replace('<!-- HEADCODE-->', $headContent, $html);
echo $html;

If you wanted to get fancy, you could create a class to manage this for you. Then, instead of doing ob_get_clean, just add a callback to ob_start.

class MyOutputBuffer {
    $positions = array (
        'HEAD' => '',
    );

    public function addTo($place, $value) {
        if (!isset($this->positions[$place])) $this->positions[$place] = '';
        $this->positions[$place] .= $value;
    }

    public function render($string) {
        foreach ($this->positions as $k => $v) {
           $string = str_replace('<!-- '.$k.'CODE-->', $v, $string);
        }
        return $string;
    }
}

$buffer = new MyOutputBuffer();
ob_start(array($buffer, 'render'));

Then, in your code, just do $buffer->addTo('HEAD', '<myscript>');

ircmaxell 2010-06-14 18:58:34

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Insert Values after Compiler has passed Line

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