PHP is likely to crash when the following PHP extensions are installed together with Blackfire:

  • XHProf

  • Pinba

  • Suhosin

Blackfire and/or the PHP engine may not behave as expected when the following extensions are activated when profiling:

  • XDebug

  • pcov

Consider disabling these extensions when profiling.

Symptoms using pcov extension

When using pcov extension together with Blackfire, you may experience "flat" profiles and grouped function calls, making the profile inconsistent:

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