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<?php ob_start(); // assume ob_level is set to 1 $GLOBALS['test'] = false; // is used too check if output is called before test is set to true function output_check() { if($GLOBALS['test'] === true) return; // this is called before test is set to true, there's no return echo "This will be echoed before 'duck': "; die(); // this will end the execution after echoeing duck echo "This will not be echoed, yet 'duck' will be."; } header_register_callback("output_check"); ob_end_clean(); echo "duck"; echo 'duck'; echo 'goose'; $GLOBALS['test'] = true; echo " and ducklings";
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1
This will be echoed before 'duck': duck
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 This will be echoed before 'duck': duck
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
This will be echoed before 'duck':
preferences:
185.53 ms | 410 KiB | 5 Q