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| <h1>Working with the Debugger |
| </h1> |
| <p style="font-style: italic;" align="center">The purpose of this tutorial |
| is to teach you how to debug files and applications both remotely and |
| locally in order to gain maximum efficiency and accuracy from your files |
| and projects.</p> |
| <p class="Strong"><a name="Contents" id="Contents"></a>Contents:</p> |
| <table cellspacing="0" width="100%"> |
| <col style="width: 50%;"> |
| <col style="width: 50%;"> |
| <tr style="vertical-align: top;"> |
| <td style="width: 50%; padding-right: 10px; padding-left: 10px;"><p><a |
| href="#Purpose_and_Usage">Purpose and Usage</a></p></td> |
| <td style="width: 50%; padding-right: 10px; padding-left: 10px;"><p> </p></td> |
| </tr> |
| <tr style="vertical-align: top;"> |
| <td style="width: 50%; padding-right: 10px; padding-left: 10px;"><p><a |
| href="#Debugging_PHP_Files">Debugging Local PHP Files (PHP Scripts)</a></p></td> |
| <td style="width: 50%; padding-right: 10px; padding-left: 10px;"><p> </p></td> |
| </tr> |
| <tr style="vertical-align: top;"> |
| <td style="width: 50%; padding-right: 10px; padding-left: 10px;"><p><a |
| href="#Debugging_PHP_Applications">Debugging PHP Applications |
| (PHP Web Pages)</a></p></td> |
| <td style="width: 50%; padding-right: 10px; padding-left: 10px;"><p> </p></td> |
| </tr> |
| </table> |
|   |
| <h2><a name="Purpose_and_Usage" id="Purpose_and_Usage"></a>Purpose and |
| Usage</h2> |
| <p>PDT 's |
| Debugging feature can detect and diagnose errors in PHP code situated |
| locally or on remote servers. The debugger allows you to control the execution |
| of your program by setting breakpoints, suspending launched programs, |
| stepping through your code, and examining the contents of variables.</p> |
| <p>Debugging should be used at stages where your scripts and applications |
| are formed sufficiently to be tried and tested.</p> |
| <p>PDT includes |
| several types of debugging:</p> |
| <ul type="square"> |
| <li><p>Locally Debugging PHP Scripts - Debugging PHP files using |
| an internal PHP Executable |
| debugger.</p></li> |
| |
| <li><p>Debugging PHP Web Pages - Debugging files, applications and |
| projects on your server </p></li> |
| |
| |
| </ul> |
| <p align="right"><a |
| href="#Contents">Back to Top</a> </p> |
| <h2><a name="Debugging_PHP_Files" id="Debugging_PHP_Files"></a>Debugging |
| Local PHP Files (PHP Scripts)</h2> |
| <p>PHP files (PHP Scripts) on your workspace can be debugged locally |
| using PDT's internal debugger. </p> |
| <div> |
| <p class="Note">Note:</p> |
| <p class="NoteText">Your server must be running the XDebug in order for remote debugging capabilities to function.<br> |
| </p> |
| </div> |
| <p class="Strong"><a name="Debugging_Files_Locally" id="Debugging_Files_Locally"></a>Debugging |
| a PHP File Locally</p> |
| <p>Files can be debugged using PDT |
| 's internal debugger.</p> |
| <table cellspacing="0" width="100%"> |
| <col style="width: 7.093%;"> |
| <col style="width: 92.907%;"> |
| <tr style="vertical-align: top;"> |
| <td style="width: 7.093%; padding-right: 10px; padding-left: 10px;"><p |
| style="font-size: 6pt;"> </p></td> |
| <td style="width: 92.907%; padding-right: 10px; padding-left: 10px;"><p |
| style="font-weight: bold;"> </p></td> |
| </tr> |
| <tr style="vertical-align: top;"> |
| <td style="width: 7.093%; padding-right: 10px; padding-left: 10px;"><p |
| style="font-size: 6pt;"><img src="ref_icon.png" alt="Instructions on how to complete a procedure" title="Instructions on how to complete a procedure" style="border: none;" width="28" height="33" border="0"></p></td> |
| <td style="width: 92.907%; padding-right: 10px; padding-left: 10px;"><p |
| style="font-weight: bold;">This procedure demonstrates how |
| to debug a file using the internal debugger or your server's debugger:</p> |
| <ol type="1"> |
| <li class="p" style="margin-left: -20px;"><p><a name="steps_1_3" |
| id="steps_1_3"></a>Inside |
| a PHP project, <a href="javascript:void(0);" id="a1" onmouseover="if (parseInt(navigator.appVersion) >= 4 && typeof(BSPSPopupOnMouseOver) == 'function') BSPSPopupOnMouseOver(event);" class="BSSCPopup" onclick="BSSCPopup('creating_a_php_file_within_a_project.htm');return false;">create a PHP file</a>, called |
| "debug", and copy-paste the example code into it. |
| ( <a href="debugger_code_.htm">Click |
| here to see the code</a> .) |
| |
| </p></li> |
| <li class="p" style="margin-left: -20px;"><p>Set a breakpoint |
| at line 103 by double-clicking the marker bar to the left |
| of the editor window.<span style="margin-left: 40px;"><br> |
| A blue ball will appear.</span></p></li> |
| <li class="p" style="margin-left: -20px;"><p>Save the file.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Click the arrow |
| next to the debug button <img src="debug_icon.png" alt="debug_icon.png" style="border: none;" width="39" height="25" border="0"> |
| on the toolbar and select <span style="font-weight: bold;"><b>Debug |
| Configurations</b></span>... -or- select <span style="font-weight: bold;"><b>Run |
| | Debug Configurations</b></span> from the main menu -or- right-click |
| the file in PHP Explorer view and select <span style="font-weight: bold;"><b>Debug |
| Configurations....</b></span><br> |
| A Debug dialog will appear.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Double-click the |
| PHP Script option to create a new debug configuration.</p></li> |
| </ol> |
| <p class="picture">  <img src="debug_phpscript_configuration.png" alt="New Debug Configuration" title="New Debug Configuration" style="border: none;" width="510" height="398" border="0"> |
| </p> |
| |
| <ol start="6" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>Enter a name for |
| the new configuration.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>To debug the file |
| using your |
| PHP Executable debugger, select the PHP Executable option |
| in the Debugger Location category. |
| |
| </p></li> |
| <li class="p" style="margin-left: -20px;"><p>Under PHP File, |
| click <span style="font-weight: bold;"><b>Browse</b></span> and select |
| the "debug" file.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Ensure that the |
| 'Break at First Line' Breakpoint checkbox is selected.</p></li> |
| </ol> |
| <ol start="9" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>Click <span style="font-weight: bold;"><b>Apply</b></span> |
| and then <span style="font-weight: bold;"><b>Debug</b></span>.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Click <span style="font-weight: bold;"><b>Yes</b></span> |
| if asked whether to open the PHP Debug Perspective.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>A number of views |
| will open with information about your script.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>The Debug View |
| is where the debug stack trace is displayed and the debugging |
| process can be monitored and controlled.</p></li> |
| </ol> |
| <p class="picture"><img src="debug_view.png" alt="Debug View" title="Debug View" style="border: none;" width="315" height="175" border="0"></p> |
| <p style="margin-left: 24px;">The debugging process will currently |
| have stopped where your first <?php label appears.</p> |
| <ol start="13" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>Click the Resume |
| icon <img src="resume_icon.png" alt="resume_icon.png" style="border: none;" width="25" height="24" border="0"> to continue |
| to the breakpoint.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Click Step Into |
| <img src="step_into_icon.png" alt="step_into_icon.png" style="border: none;" width="27" height="24" border="0">. The Debugger |
| goes into the function defined in line 103 and advances to |
| line 77.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>The Variable view |
| will now display various information about the relevant variables |
| and parameters through which the function was reached.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>In the editor |
| window, place and hold the cursor over $worker_name, $worker_address, |
| and $worker_phone. A tooltip appears displaying the variable |
| values.</p></li> |
| </ol> |
| <p class="picture"><img src="debug_tutorial_editor.png" alt="Editor View While Debugging" title="Editor View While Debugging" style="border: none;" width="395" height="235" border="0"></p> |
| <ol start="17" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>Click Step Return. |
| <img src="debug_step_return_icon.png" alt="debug_step_return_icon.png" style="border: none;" width="25" height="24" border="0"> The cursor returns |
| to line 103.<br> |
| The Debug Output view will display the HTML output created |
| up until the breakpoint, while the Browser Output view will |
| show the current output to a browser.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>In the Debug view, |
| click Resume <img src="resume_icon.png" alt="resume_icon.png" style="border: none;" width="25" height="24" border="0">  until |
| the debugging process is terminated.<br> |
| Notice that as the debugging process progresses, the Debug |
| Output and Browser Output displays are updated.</p></li> |
| </ol> |
| <p class="picture"><img src="debug_browser_output.png" alt="Browser Output" title="Browser Output" style="border: none;" width="292" height="203" border="0"></p> |
| <ol start="19" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>The console view |
| will display any errors or warnings about your script. In |
| this case, it will display a Notice about an undefined variable |
| on line 105.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Click on the PHP |
| Perspective icon to return to normal editing mode.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>To run the debugging |
| process again, click the arrow next to the debug icon <img src="debug_icon.png" alt="debug_icon.png" style="border: none;" width="39" height="25" border="0"> on the toolbar and select your configuration |
| -or- select <span style="font-weight: bold;"><b>Debug Configurations...</b></span> |
| and double-click your configuration from the "Debug" |
| dialog.<br> |
| Clicking the debug icon will debug the last executed launch |
| configuration.</p></li> |
| </ol></td> |
| </tr> |
| <tr style="vertical-align: top;"> |
| <td colspan="2" style="width: 100%; padding-right: 10px; padding-left: 10px;"><p> </p></td> |
| |
| </tr> |
| </table> |
| <p align="right"><a |
| href="#Contents">Back to Top</a> </p> |
| |
| |
| <div> |
| <p class="Note">Note:</p> |
| <p class="NoteText">Your server must be running the XDebug in order for remote debugging capabilities to function.<br> |
| </p> |
| </div> |
| |
| |
| <h2><a name="Debugging_PHP_Applications" id="Debugging_PHP_Applications"></a>Debugging |
| PHP Applications (PHP Web Pages)</h2> |
| <p>PDT also |
| allows you to debug applications, projects or files that are already on |
| the server. |
| </p> |
| <div> |
| <p class="Note">Note:</p> |
| <p class="NoteText">Your server must be running the XDebug in order for remote debugging capabilities to function.<br> |
| </p> |
| </div> |
| <table cellspacing="0" width="100%"> |
| <col style="width: 7.093%;"> |
| <col style="width: 92.907%;"> |
| <tr style="vertical-align: top;"> |
| <td style="width: 7.093%; padding-right: 10px; padding-left: 10px;"><p |
| style="font-size: 6pt;"> </p></td> |
| <td style="width: 92.907%; padding-right: 10px; padding-left: 10px;"><p |
| style="font-weight: bold;"> </p></td> |
| </tr> |
| <tr style="vertical-align: top;"> |
| <td style="width: 7.093%; padding-right: 10px; padding-left: 10px;"><p |
| style="font-size: 6pt;"><img src="ref_icon.png" alt="Instructions on how to complete a procedure" title="Instructions on how to complete a procedure" style="border: none;" width="28" height="33" border="0"></p></td> |
| <td style="width: 92.907%; padding-right: 10px; padding-left: 10px;"><p |
| style="font-weight: bold;">This procedure demonstrates how |
| to debug applications on a server:</p> |
| <ol type="1"> |
| <li class="p" style="margin-left: -20px;"><p>Inside a PHP project, |
| <a href="creating_a_php_file_within_a_project.htm">create |
| a new PHP file</a>, called "form1", with the following |
| code:</p></li> |
| </ol> |
| <p class="code" style="margin-left: 0px;"><html></p> |
| <p class="code" style="margin-left: 0px;"><body></p> |
| <p class="code" style="margin-left: 0px;"><form action="welcome.php" |
| method="post"></p> |
| <p class="code" style="margin-left: 0px;">Name: <input type="text" |
| name="name" /></p> |
| <p class="code" style="margin-left: 0px;">Age: <input type="text" |
| name="age" /></p> |
| <p class="code" style="margin-left: 0px;"><input type="submit" |
| /></p> |
| <p class="code" style="margin-left: 0px;"></form></p> |
| <p class="code" style="margin-left: 0px;"></body></p> |
| <p class="code" style="margin-left: 0px;"></html></p> |
| <ol start="2" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>Create a second |
| PHP file, called "welcome", with the following code:</p></li> |
| </ol> |
| <p class="code" style="margin-left: 0px;"><html></p> |
| <p class="code" style="margin-left: 0px;"><body></p> |
| <p class="code" style="margin-left: 0px;">Welcome <?php echo |
| $_POST["name"]; ?>.<br /></p> |
| <p class="code" style="margin-left: 0px;">You are <?php echo |
| $_POST["age"]; ?> years old.</p> |
| <p class="code" style="margin-left: 0px;"></body></p> |
| <p class="code" style="margin-left: 0px;"></html></p> |
| <ol start="3" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>Save both files |
| and copy them to your server.</p></li> |
| <li class="p" style="margin-left: -20px;"><p><a name="step_4" |
| id="step_4"></a>Click |
| the arrow next to the debug button <img src="debug_icon.png" alt="debug_icon.png" style="border: none;" width="39" height="25" border="0">  on |
| the toolbar and select Debug Configurations... -or- right-click |
| the file in PHP explorer or within the file's editor window |
| and select <span style="font-weight: bold;"><b>Debug as | Debug |
| Configurations....</b></span><br> |
| A Debug dialog will appear.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Double-click on |
| the PHP Web Page option to create a new debug configuration.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Enter a name for |
| the new configuration.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Select the Debugger from the Server Debugger drop-down |
| list.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Select your server |
| from the drop-down list.<br> |
| If you have not configured a server, click the PHP Servers |
| link to be taken to the <a href="php_servers.htm">PHP Servers |
| Preferences</a> page.</p></li> |
| </ol> |
| <ol start="9" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>Under the File/Project |
| category, click <span style="font-weight: bold;"><b>Browse</b></span> |
| and select the "form1" file. This will be the file |
| from which the debugger will start debugging (the 'debug target'.)</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Ensure that the |
| URL pointing to the file location is correct.<br> |
| If this is not correct, unmark the Auto Generate checkbox and |
| manually change the URL.</p></li> |
| </ol> |
| |
| |
| <p class="picture"><img src="debug_configuration_webpage.png" alt="New Debug Configuration" title="New Debug Configuration" style="border: none;" width="429" height="336" border="0"></p> |
| <ol start="11" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>Click <span style="font-weight: bold;"><b>Apply</b></span> |
| and then <span style="font-weight: bold;"><b>Debug</b></span>.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Click <span style="font-weight: bold;"><b>Yes</b></span> |
| when asked whether to open the PHP Debug Perspective.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>The Debug Perspective |
| will open with several views relevant to the debugging process |
| (See '<a href="php_debug_perspective.htm">PHP Debug Perspective</a>' |
| for more information on the different views.)</p></li> |
| <li class="p" style="margin-left: -20px;"><p>In the editor |
| view, you will see the code for the "form1" file.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>In the Debug view, |
| click <span style="font-weight: bold;"><b>Resume</b></span> to resume |
| the debugging process.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>The browser output |
| will display a form asking you to enter your Name and Age.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Select the browser |
| view (tabbed with the editor window). This will display the |
| output of your script in a browser in 'real time'.<br> |
| Note that this is different from the Browser Output window.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>In the browser |
| view, enter your Name and Age and click <span style="font-weight: bold;"><b>Submit |
| Query</b></span>.</p></li> |
| </ol> |
| <p class="picture"><img src="debug_webpage_ouput.png" alt="Browser View" title="Browser View" style="border: none;" width="567" height="131" border="0"></p> |
| <ol start="20" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>Another editor |
| tab will open, with the script from the welcome.php file.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>In the Debug view, |
| click <span style="font-weight: bold;"><b>Resume</b></span> to resume |
| the debugging process.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>The browser output |
| and browser views will display the final result of your application:<br> |
| "Welcome [Name].<br> |
| You are [Age] years old."</p></li> |
| </ol> |
| <p class="picture"><img src="debug_webpage_browser_output.png" alt="Browser Output" title="Browser Output" style="border: none;" width="251" height="99" border="0"></p> |
| <ol start="23" type="1"> |
| <li class="p" style="margin-left: -20px;"><p>The debugging |
| process will have terminated.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>Click on the PHP |
| Perspective icon to return to normal editing mode.</p></li> |
| <li class="p" style="margin-left: -20px;"><p>To run the debugging |
| process again, click the arrow next to the debug icon <img src="debug_icon.png" alt="debug_icon.png" style="border: none;" width="39" height="25" border="0"> on the toolbar and select your debugging |
| configuration.</p></li> |
| </ol></td> |
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| style="font-weight: bold;">Related Links:</p> |
| <p><a href="debugging.htm">Debugging</a></p> |
| <p><a href="debugging.htm">Using |
| the Debugger</a></p> |
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| <p><a href="debugging_a_php_web_page.htm">Debugging |
| a PHP Web Page</a></p> |
| |
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| Preferences</a></p> |
| <p><a href="analyzing_debugger_results.htm">Running |
| and Analyzing Debugger Results</a></p></td> |
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