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Can  be  very  big Can  be  spread  across  many  files Can  be  spread  across  multiple  devices

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DBGP  Server:  9000 IDE  Key:  $_COOKIE,$_GET Breakpoints Remote  IP Remote  Port IDE  Key

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DBGP  Server:  9000 export  XDEBUG_CONFIG="idekey=X" Breakpoints Remote  IP Remote  Port IDE  Key

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XDebug Function  Trace

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LLDB  /  GDB

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Strace /  dtruss

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1. Check  log  files 2. Try  to  reproduce  the  bug 3. Go  through  the  code  step-­‐by-­‐step 4. Add  breakpoint  at  important  locations

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KNOW  THE  DOMAIN

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SINGLE  RESPONSIBILITY • One  class  has  one  responsibility • Use  controllers  to  transform  the  request  in  a  response • Use  services  to  handle  business  logic • Use  data  managers  to  collect  /  store  data • Use  Events  to  trigger  side  actions • Use  validators  for  validation

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DEFENSIVE  PROGRAMMING • Enable  strict  types • Specify  all  argument  types • Specify  return  type • Validate  state • Don't  be  afraid  to  throw  exceptions • Always  keep  track  of  the  unhappy  path

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CODE  CALISTENICS 1. Only  one  indentation  per  method 2. Do  NOT  use  the  "else"  keyword 3. Wrap  all  primitive  types  if  it  has  behavior 4. Only  one  -­‐>  per  line 5. Do  not  abbreviate 6. Keep  your  classes  small 7. Limit  the  number  of  instance  variables 8. Use  first  class  collections

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PHP  Inspections  EA  extended PHP  Annotations Symfony  Plugin Magicento Drupal  Plugin IDE  CONFIGURATION

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AUTOMATED  TESTING PHP-­‐CS LINTERS

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CODE  REVIEWS

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