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<?php class ToString { public function __toString() { return 'baz'; } } $handle = fopen("php://memory", "r"); var_dump((string) 5); var_dump((string) 1.5); var_dump((string) 'foo'); var_dump((string) null); var_dump((string) true); var_dump((string) false); var_dump((string) new ToString()); var_dumP((string) new \stdClass); var_dumP((string) $handle);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
string(1) "5" string(3) "1.5" string(3) "foo" string(0) "" string(1) "1" string(0) "" string(3) "baz" Fatal error: Uncaught Error: Object of class stdClass could not be converted to string in /in/fNrUf:19 Stack trace: #0 {main} thrown in /in/fNrUf on line 19
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 string(1) "5" string(3) "1.5" string(3) "foo" string(0) "" string(1) "1" string(0) "" string(3) "baz" Fatal error: Uncaught Error: Object of class stdClass could not be converted to string in /in/fNrUf:19 Stack trace: #0 {main} thrown in /in/fNrUf on line 19
Process exited with code 255.
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33
string(1) "5" string(3) "1.5" string(3) "foo" string(0) "" string(1) "1" string(0) "" string(3) "baz" Recoverable fatal error: Object of class stdClass could not be converted to string in /in/fNrUf on line 19
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
string(1) "5" string(3) "1.5" string(3) "foo" string(0) "" string(1) "1" string(0) "" string(3) "baz" Catchable fatal error: Object of class stdClass could not be converted to string in /in/fNrUf on line 19
Process exited with code 255.
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