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<?php header_register_callback( fn() => mb_detect_encoding('foo') );
Output for 8.4.1 - 8.4.16, 8.5.0 - 8.5.1
Fatal error: Uncaught ValueError: mb_detect_encoding(): Argument #2 ($encodings) must specify at least one encoding in /in/0EDPU:2 Stack trace: #0 /in/0EDPU(2): mb_detect_encoding('foo') #1 [internal function]: {closure:/in/0EDPU:2}() #2 {main} thrown in /in/0EDPU on line 2
Process exited with code 255.
Output for 8.1.34, 8.3.0 - 8.3.29
Fatal error: Uncaught ValueError: mb_detect_encoding(): Argument #2 ($encodings) must specify at least one encoding in /in/0EDPU:2 Stack trace: #0 /in/0EDPU(2): mb_detect_encoding('foo') #1 [internal function]: {closure}() #2 {main} thrown in /in/0EDPU on line 2
Process exited with code 255.

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