Hi guys, i've started to write some website and bumped into this problem.. have tried all the solutions on the forum that i could search for..
E.g clear any blanks on the main_left.php (code shown below)
no echo on main_left.php
and also ob_start();
none of it works...

Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\cags\menu\main_left.php:82) in C:\xampp\htdocs\cags\phpBB3\common.php on line 58

Code for main_left.php

<!-- Left-side panel of main page -->
		<div id="categories">
		  <div id="categories_header">
			<h2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;User Refine</h2>
		  </div>
		  <div>
           	<p>Budget</p>
            <div align="left">
				<select>
                	<option>--Please Select--</option>
                	<option>Below RM1000</option>
  					<option>RM1000 - RM1999</option>
  					<option>RM2000 - RM2999</option>
  					<option>RM3000 - RM3999</option>
                    <option>RM4000 - RM4999</option>
                    <option>RM5000 - RM5999</option>
                    <option>RM6000 - RM6999</option>
                    <option>RM7000 - RM7999</option>
                </select>
            </div>
           	<p>Processor</p>
            <div align="left">
				<select>
                  <option>--Please Select--</option>
				  <option>Intel Atom</option>
				  <option>2nd Gen Intel Core vPro</option>
				  <option>2nd Gen Intel Core i3</option>
				  <option>2nd Gen Intel Core i5</option>
				  <option>2nd Gen Intel Core i7</option>
				  <option>2nd Gen Intel Core i7 Extreme</option>
				  <option>AMD Athlon</option>
				  <option>AMD Athlon X2 Dual-Core</option>
				  <option>AMD Athlon II</option>
				  <option>AMD Phenom</option>
				  <option>ADM Phenom II</option>
                </select>
            </div>
            <p>Graphic Card</p>
            <div align="left">
				<select>
                  <option>--Please Select--</option>
				  <option>ATI Radeon HD 4000 Series</option>
				  <option>ATI Radeon HD 5000 Series</option>
				  <option>ATI Radeon HD 6000 Series</option>
				  <option>NVDIA GeForce Series</option>
				  <option>NVDIA GeForce GT Series</option>
				  <option>NVDIA GeForce GTS Series</option>
				  <option>NVDIA GeForce GTX Series</option>
                </select>
           	</div>
            <p>Hard Drive</p>
            <div align="left">
				<select>
                  <option>--Please Select--</option>
				  <option>250GB</option>
				  <option>320GB</option>
				  <option>500GB</option>
				  <option>1TB</option>
				  <option>2TB</option>
				  <option>4TB</option>
                </select>
           	</div>
            <p>Memory (RAM)</p>
            <div align="left">
            	<select>
                  <option>--Please Select--</option>
            	  <option>1GB DDR3</option>
            	  <option>2GB DDR3</option>
            	  <option>4GB DDR3</option>
            	  <option>6GB DDR3</option>
            	  <option>8GB DDR3</option>
                  <option>16GB DDR3</option>
                </select>
            </div>
            <p></p>
            <div algin="left">
				<button type="button">Search</button>
            </div>
            <div class="clearthis">&nbsp;</div>
          </div>
		  <div class="clearthis">&nbsp;</div>
	  </div>
Member Avatar for diafol

seems you're using an include file with header() in it. Showing the above code doesn't help. Perhaps if you show where the common.php file is called and what comes before it.

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