PHPSTORM TUTORIALS CODE
Clicking the Evaluate Arbitrary Expression button in the debug tool window toolbar lets us do exactly this: run some code and inspect the result. For example, we may want to verify if the add() function does what it's supposed to do. Sometimes it can be useful to run an expression during debugging. Keep in mind that executing functions may change script behaviour if they perform actions that influence variables etc. We could, for example, monitor PHP's error_get_last() function by adding it to Watches. For example, we can use it to view the results of a specific function call that depends on the execution context. The Watches pane also supports watching expressions. Here's an example: (note I dragged the Variables pane out into a separate window to make it easier to see the amount of data presented)
When a breakpoint outside that function is hit, those variables will not be available. For example for a breakpoint inside a function body, the variables created within that function will be visible. In the Variables pane, we can see the variables that are in scope at the current breakpoint. Note that when clicking a frame, the Variables pane is also updated to display the variables that are in scope at that position of our script's execution. Clicking a frame will open the editor at the exact location of that frame. Using frames we can see exactly how we ended up at our breakpoint. That call originated from line 16 of debugging.php, in the script's main function.The top frame is on line 11 of debugging.php, in the sum function.
For example when we place a breakpoint on the last line of our sum function, the Frames window will tell us that: In the Frames pane, we can see the call stack at the current breakpoint. Or we could make the Watches pane float, again by dragging it out of the debug tool window. For example when multiple monitors are used, the console tab can be made floating by dragging it out. The tool window layout can be customized at will. The Console tab, which displays the output of our PHP script.Consider them "bookmarks" for data shown in the Variables pane. The Watches pane, where we can watch expressions that we are interested in.The Variables pane, which displays all variables that are available in the current scope where execution is paused.The Frames pane, which shows us the call stack or execution stack of a script.The debugger toolbars, which let us pause, continue or step through script execution.Once the debugger is launched, PhpStorm shows us the debug tool window. Since we now have the debugger launched, let's explore it. It can be used to look at the execution stack, variables currently in scope, watched expressions and more. Near the bottom, we can also see the debug tool window. The line is marked in blue, which means that all lines before have been executed and the PHP interpreter is about to execute the marked line if we let it. This will launch our script with the debugger attached, and pauses execution at the first breakpoint.
PHPSTORM TUTORIALS MAC OS
We can also use the Run | Debug menu or the Shift+F9 keyboard shortcut ( CMD+F9 on Mac OS X). Launch the Debuggerįrom the toolbar, click the "bug" icon to start the debugger. We can do this by checking the Run | Break at first line in PHP scripts menu. Sometimes we just want to pause execution right at the start of the script.
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