[HELP] PHP Operator Clarification

[shiloh2]

Hi, i just want to ask for any help about my problem.. Im using javascript to get the value of my dropdown. using the onchange Event. Here is my Code:

 

my  dropdown selected is "Third Grading"

$drop = '<script language="javascript">document.write(document.getElementById("grading").value)</script>';
if ($drop == "Third Grading") {
echo "ok";
}else{
echo "no";
}

 

i used var_dump($drop) and var_dump("Third Grading") .. this is the result

 

string(95) "Third Grading" string(13) "Third Grading"

end one echo "no" resulting the else in if statement..

 

can someone help me why it results to "no".. 

 

[Philip]

Well, technically $drop is

<script language="javascript">document.write(document.getElementById("grading").value)</script>

Since PHP is server side, that would not parse until the user views it - at which point PHP has already done its job

[pkedpker]

you have to evalulate the javascript function PHP just uses that whole javascript as a text.. its not code in PHP

[shiloh2]

@kingphilip

Yes, it is  <script language="javascript">document.write(document.getElementById("grading").value)</script> ..

but when i var_dump that, it will return to "Third Grading"  .. so i decided to match with a string.. but fails. any ideas?

 

 

@pkedpker.

how to encode it to php?  ..

[Philip]

Do you see the difference between the two:

var_dump($drop) => string(95) "Third Grading"

var_dump("Third Grading") => string(13) "Third Grading"

 

[pkedpker]

yah like what King pointed out the first one is Third Grading but its a string of 95 characters but just Third Grading is 13 characters

 

U'd have to use ajax to do what you are trying to do is simple form get/post METHOD

 

or why not code it completely in javascript i'm sure there is a ECHO command in javascript.

[shiloh2]

yes i saw that.. they dont have the same string length..  but what im after is the string value itself. do you have some idea on how to match the two??  thanks in advance..

[pkedpker]

I have no idea what you are trying to do but your problem is extremely easy you should of just posted more code..

 

I think what you are attempting to do is when a user picks a dropdown selection.. it would send something to PHP to check if its Third Grading then return ok or no.. I don't think just selecting something in a dropdown will actually send anything unless you mess around with javascript like on dropdown change onClick=javaScript:submit.form(); or something like that.. which will then send it to PHP and it will all work fine. 

[shiloh2]

im not good at javascript. that's why im here asking for ideas ..

[pkedpker]

work of this I'm not good at javascript either.. just started it today but its not hard to pick it up.. I mean i did in a day..

 

<?php //cOLOrZ
<form name="myform" action="grading.php" method="POST">
<SELECT>
<OPTION value="Third Grading" selected onClick="submitform();">3rd</option>
<OPTION value="Second Grading" onClick="submitform();">2nd</option>
<OPTION value="First Grading" onClick="submitform();">1st</option>
</select></form>
<SCRIPT language="JavaScript">
function submitform()
{
  document.myform.submit();
}
</SCRIPT>
?>

 

Note that above is not PHP file its just a plain html file.. BUT IT calls a PHP file.. with a $ans = $_POST['Third Grading'];

[shiloh2]

OK, i think i can re plan my logic here. and i can apply your idea. thank's for helping. i will repost if what will be the outcome. thanks again