<?php // capture any unexpected output and exit execution ob_start(function($buffer) { var_dump($buffer); echo 'unexpected output: ' . $buffer . "\n"; exit; }, 1); // do some work on shutdown register_shutdown_function(function() { echo "Call ob_flush\n"; ob_flush(); echo "Call ob_end_clean\n"; ob_end_clean(); echo 'shutting down'; }); echo 'x';
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