Code doesn't execute until button triggered - php

Question

I need your help. So the problem is that I've done some coding but I don't know why it doesn't work when page loads. But when I trigger any button (Save Info Modification Or Cancel Info Modification) it works.
php code :
if(isset($_POST['nametb']) && isset($_POST['usernametb']) && isset($_POST['emailtb']) && isset($_POST['confirmtb']) && isset($_POST['abouttb']) && isset($_POST['interesttb']) && isset($_POST['dreamtb']) && isset($_POST['liketb']) && isset($_POST['schooltb']) && isset($_POST['schoolyrtb']) && isset($_POST['occupationtb']) && isset($_POST['occupationyrtb'])){
$select_info = "SELECT * from user_info WHERE id='$user_id'";
if($select_info_run = #mysql_query($select_info)){
$namedb = mysql_result($select_info_run, 0, 'name');
$usernamedb = mysql_result($select_info_run, 0, 'username');
$emaildb = mysql_result($select_info_run, 0, 'email');
$confirmdb = mysql_result($select_info_run, 0, 'email');
$aboutdb = mysql_result($select_info_run, 0, 'about');
$interestdb = mysql_result($select_info_run, 0, 'interest');
$dreamdb = mysql_result($select_info_run, 0, 'dream');
$likedb = mysql_result($select_info_run, 0, 'like');
$schooldb = mysql_result($select_info_run, 0, 'school');
$schoolyrdb = mysql_result($select_info_run, 0, 'schoolyr');
$occupationdb = mysql_result($select_info_run, 0, 'occupation');
$occupationyrdb = mysql_result($select_info_run, 0, 'occupationyr');
}
else{
echo 'Server down :(';
}
}
else{
echo server down :(';
}
html code :
<form action="<?php if(isset($current_file)){ echo $current_file; } ?>" method="POST">
<fieldset id="fieldset1">
<legend style="font-family: Ubuntu; font-size:20px;">Info</legend>
<label id="name" title="Name" for="textbox1">Name :</label>
<label id="username" title="UserName" for="textbox2">UserName :</label>
<label id="email" title="Email" for="textbox3">Email :</label>
<label id="confirm" title="Confirm Email" for="textbox4">Confirm :</label>
<br />
<input type="text" id="textbox1" name="nametb" value="<?php if(isset($namedb)){ echo $namedb; } ?>" />
<input type="text" id="textbox2" name="usernametb" value="<?php if(isset($usernamedb)){ echo $usernamedb; } ?>" />
<input type="text" id="textbox3" name="emailtb" value="<?php if(isset($emaildb)){ echo $emaildb; } ?>" />
<input type="text" id="textbox4" name="confirmtb" value="<?php if(isset($confirmdb)){ echo $confirmdb; } ?>" />
<br /><br />
<div id="hrln"><hr /></div>
<label id="about" title="About you" for="textarea1">About :</label>
<label id="interest" title="You are interested in?" for="textarea2">Interested in :</label>
<br />
<textarea id="textarea1" name="abouttb"><?php if(isset($aboutdb)){ echo $aboutdb; } ?></textarea>
<textarea id="textarea2" name="interesttb"><?php if(isset($interestdb)){ echo $interestdb; } ?></textarea>
<br /><br /><br /><br /><br /><hr />
<label id="dream" title="Your Dream?" for="textarea3">Dream :</label>
<label id="like" title="What do you like?" for="textarea4">You like :</label>
<br />
<textarea id="textarea3" name="dreamtb"><?php if(isset($dreamdb)){ echo $dreamdb; } ?></textarea>
<textarea id="textarea4" name="liketb"><?php if(isset($likedb)){ echo $likedb; } ?></textarea>
<br /><br /><br /><br /><br /><hr />
<label id="education" title="Your school" for="textbox5">School | University :</label>
<label id="educationyr" title="Year" for="textbox6">Year :</label>
<br />
<input type="text" name="schooltb" id="textbox5" value="<?php if(isset($schooldb)){ echo $schooldb; } ?>" />
<input type="text" name="schoolyrtb" id="textbox6" value="<?php if(isset($schoolyrdb)){ echo $schoolyrdb; } ?>" />
<br /><br /><hr />
<label id="occupation" title="Occupation" for="textbox7">Occupation :</label>
<label id="occupationyr" title="Year" for="textbox6">Year :</label>
<br />
<input type="text" id="textbox7" name="occupationtb" value="<?php if(isset($occupationdb)){ echo $occupationdb; } ?>" />
<input type="text" id="textbox8" name="occupationyrtb" value="<?php if(isset($occupationyrdb)){ echo $occupationyrdb; } ?>" />
<br /><br /><hr />
<label id="passwords" title="For Security Purpose" for="textbox9">Password :</label>
<input type="password" id="textbox9" name="passwordstb" />
<input type="submit" value="Save Info Modification" name="save" id="button1" />
<input type="submit" value="Cancel Info Modification" name="cancel" id="button2" />
</fieldset>
</form>

Answer 1

Do you want the form to display? Then, get rid of that echo in the last "else". Then the form will display. When a user clicks the submit button, the form will post that information to the page.
Also, your 2nd "else{ echo server down :('; }" is missing a quote before 'server down :(';
The key to your problems is what I call "isolation": you need to isolate what is causing the issue. I recommend the "comment-out-code-and-refresh-page" technique if you're pressed for time. But it's far better to analyze and interpret your code and UNDERSTAND why it's not doing what you want.

Answer 2

It runs when you click the buttons because of this:
if(isset($_POST['nametb']) && isset($_POST['usernametb']) && isset($_POST['emailtb']) &&
isset($_POST['confirmtb']) && isset($_POST['abouttb']) && isset($_POST['interesttb']) &&
isset($_POST['dreamtb']) && isset($_POST['liketb']) && isset($_POST['schooltb']) &&
isset($_POST['schoolyrtb']) && isset($_POST['occupationtb']) &&
isset($_POST['occupationyrtb'])){
Your if statement is checking if anything in the POST array is set before doing anything.
This is sent by the form when you click a submit button (which is either button, it seems).
If you are trying to populate the fields on page load, you need to move your SELECT statement an related code outside of that if statement. Since it seems you would be using this form to update database data, you should put your INSERT/UPDATE statements inside the if statement so that they won't run until you click the submit button (pending other logical operations to take into account WHICH button was pressed.).