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<?php $x = new DateTimeImmutable('2015-07-31'); $y = $x->modify('30 day of -1 month'); var_dump($y); var_dump($y->setDate($y->format('Y'), $y->format('n'), 30)); var_dump($y->setDate((int) $y->format('Y'), (int) $y->format('n'), 30));
Output for 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught DateMalformedStringException: DateTimeImmutable::modify(): Failed to parse time string (30 day of -1 month) at position 7 (o): The timezone could not be found in the database in /in/9AbEI:5 Stack trace: #0 /in/9AbEI(5): DateTimeImmutable->modify('30 day of -1 mo...') #1 {main} thrown in /in/9AbEI on line 5
Process exited with code 255.
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 Fatal error: Uncaught DateMalformedStringException: DateTimeImmutable::modify(): Failed to parse time string (30 day of -1 month) at position 7 (o): The timezone could not be found in the database in /in/9AbEI:5 Stack trace: #0 /in/9AbEI(5): DateTimeImmutable->modify('30 day of -1 mo...') #1 {main} thrown in /in/9AbEI on line 5
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Warning: DateTimeImmutable::modify(): Failed to parse time string (30 day of -1 month) at position 7 (o): The timezone could not be found in the database in /in/9AbEI on line 5 bool(false) Fatal error: Uncaught Error: Call to a member function setDate() on bool in /in/9AbEI:7 Stack trace: #0 {main} thrown in /in/9AbEI on line 7
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Warning: DateTimeImmutable::modify(): Failed to parse time string (30 day of -1 month) at position 7 (o): The timezone could not be found in the database in /in/9AbEI on line 5 bool(false) Fatal error: Uncaught Error: Call to a member function setDate() on boolean in /in/9AbEI:7 Stack trace: #0 {main} thrown in /in/9AbEI on line 7
Process exited with code 255.
Output for 5.6.7 - 5.6.28
Warning: DateTimeImmutable::modify(): Failed to parse time string (30 day of -1 month) at position 7 (o): The timezone could not be found in the database in /in/9AbEI on line 5 bool(false) Fatal error: Call to a member function setDate() on boolean in /in/9AbEI on line 7
Process exited with code 255.
Output for 5.5.24 - 5.5.35
Warning: DateTimeImmutable::modify(): Failed to parse time string (30 day of -1 month) at position 7 (o): The timezone could not be found in the database in /in/9AbEI on line 5 bool(false) Fatal error: Call to a member function setDate() on a non-object in /in/9AbEI on line 7
Process exited with code 255.
Output for 5.4.2 - 5.4.45
Fatal error: Class 'DateTimeImmutable' not found in /in/9AbEI on line 3
Process exited with code 255.
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