disable html element in php if it exists

Question

how do i disable an html element after checking in php if it exists? in other words, after the data has been inserted into the xml file the first time, the html textbox elements should be disabled, so that the user does not enter any more information in that textbox.

is this possible?

the code checks if the element exists, and if it does, it skips the code, but i would like the html element to be disabled altogether if the element exists:

if ($xmldoc->getElementsByTagName("title")->length == 0) {
/* Arabic */
  $el_title_ar = $xmldoc->createElement('title'); 
  $root->appendChild($el_title_ar);

$text_title_ar = $xmldoc->createTextNode($title_ar);
$el_title_ar->appendChild($text_title_ar);

$el_title_ar->setAttribute('xml:lang', 'ar');
/* Arabic */

/* English */
$el_title_en = $xmldoc->createElement('title'); 
    $root->appendChild($el_title_en);

$text_title_en = $xmldoc->createTextNode($title_en);
$el_title_en->appendChild($text_title_en);

$el_title_en->setAttribute('xml:lang', 'en');
/* English */
}

Answer 1

I think it's any but definatly tfor textboxes you can put a disabled keyword in the tag like so.

<input id="myTextbox" type="text" value="something" DISABLED>

For your php page you could do something like this.

<input id="myTextbox" type="text" value="something" <?php if(whatever_exists) echo 'DISABLED'; ?>>

Hope this helps.