The Debug Dance - An Intro To Step Debugging - php[world] 2018

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legacy.joind.in/24817 @SammyK #phpworld Sammy Kaye Powers Dance The Washington, D.C. - 2018 An Intro To Step Debugging in

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legacy.joind.in/24817 @SammyK #phpworld CLOSER :) Get

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Thanks to Our Sponsors 2018

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legacy.joind.in/24817 @SammyK #phpworld Download the slides legacy.joind.in/24817

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legacy.joind.in/24817 @SammyK #phpworld Does not work for

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legacy.joind.in/24817 @SammyK #phpworld What is Debugging? Finding and fixing unexpected behavior in code

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So you write Some Code

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Does not work

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legacy.joind.in/24817 @SammyK #phpworld You could check the Error logs

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legacy.joind.in/24817 @SammyK #phpworld All the things var_dump()

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legacy.joind.in/24817 @SammyK #phpworld

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legacy.joind.in/24817 @SammyK #phpworld OR

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legacy.joind.in/24817 @SammyK #phpworld Use a ‘er

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legacy.joind.in/24817 @SammyK #phpworld Kate Gregory “ I'm not saying, ‘don't use printf()’, [...] but I think it's insane to use printf() on day one of learning C++. [...] I would ﬁrst say use the debugger. Episode 30: Stop Teaching C (When Teaching C++)

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legacy.joind.in/24817 @SammyK #phpworld …now is the perfect time to learn Step Debugging BNEW! Professional

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legacy.joind.in/24817 @SammyK #phpworld Some step-debugging Jargon

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legacy.joind.in/24817 @SammyK #phpworld a signal that tells the debugger to pause the execution of your code Breakpoint

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legacy.joind.in/24817 @SammyK #phpworld run to the next breakpoint Resume Program

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legacy.joind.in/24817 @SammyK #phpworld advance to the next line in the same scope Step Over

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legacy.joind.in/24817 @SammyK #phpworld if the next line is a function call, enter the function Step Into

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legacy.joind.in/24817 @SammyK #phpworld run to the end of the current function Step Out

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legacy.joind.in/24817 @SammyK #phpworld shows the execution path to the point where the code was paused Frames I… don’t have a cool drawing for “frames”…

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legacy.joind.in/24817 @SammyK #phpworld & Environment Setup

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legacy.joind.in/24817 @SammyK #phpworld

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legacy.joind.in/24817 @SammyK #phpworld https://xdebug.org/docs/remote Debug client (DBGp protocol)

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legacy.joind.in/24817 @SammyK #phpworld Setup

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#1 Start listening to debugging connections

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#2 Set a Breakpoint

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legacy.joind.in/24817 @SammyK #phpworld Done!

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legacy.joind.in/24817 @SammyK #phpworld Setup

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configured installed installed

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on Homebrew Install + $ brew install php $ pecl install xdebug

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on APT Install + $ add-apt-repository -y \ ppa:ondrej/php $ apt-get update $ apt-get install php7.2-xdebug

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https://xdebug.org/docs/install Install +

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No content

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legacy.joind.in/24817 @SammyK #phpworld Configure

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$ php --ini

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$ php --ini

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$ sudo vi /usr/local/etc/php/ 7.2/conf.d/ext-xdebug.ini

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$ php -i | grep xdebug

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legacy.joind.in/24817 @SammyK #phpworld Start a session or CLI

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legacy.joind.in/24817 @SammyK #phpworld Query Param XDEBUG_SESSION_START

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legacy.joind.in/24817 @SammyK #phpworld Cookie XDEBUG_SESSION

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legacy.joind.in/24817 @SammyK #phpworld

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legacy.joind.in/24817 @SammyK #phpworld

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legacy.joind.in/24817 @SammyK #phpworld Env Variable export XDEBUG_CONFIG="idekey=foo" CLI

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legacy.joind.in/24817 @SammyK #phpworld Env Variable set XDEBUG_CONFIG="idekey=foo" CLI

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legacy.joind.in/24817 @SammyK #phpworld Don’t forget to unset set XDEBUG_CONFIG= unset XDEBUG_CONFIG when you’re done

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legacy.joind.in/24817 @SammyK #phpworld alias debug-on='export XDEBUG_CONFIG="ide_key=foo"' alias debug-off='unset XDEBUG_CONFIG' Bash alias

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legacy.joind.in/24817 @SammyK #phpworld Run some code! & CLI

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legacy.joind.in/24817 @SammyK #phpworld PHP’s Built-in Web Server run locally using

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legacy.joind.in/24817 @SammyK #phpworld Built right into the CLI SAPI! $ php -S 127.0.0.1:8888

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legacy.joind.in/24817 @SammyK #phpworld

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legacy.joind.in/24817 @SammyK #phpworld learn? What did we

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legacy.joind.in/24817 @SammyK #phpworld +

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legacy.joind.in/24817 @SammyK #phpworld

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legacy.joind.in/24817 @SammyK #phpworld

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legacy.joind.in/24817 @SammyK #phpworld CLI

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legacy.joind.in/24817 @SammyK #phpworld Debugging In Action

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legacy.joind.in/24817 @SammyK #phpworld

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legacy.joind.in/24817 @SammyK #phpworld In production

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But wait! * (see me after class for more info)

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Sammy Kaye Powers Thanks! /24817 @SammyK SammyK.me Host of @PHPRoundtable legacy.