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<?php declare(strict_types=1); class StringableClass { public function __toString() { return 'helloWorld'; } } class StringEater { public function eat(string $string) { echo $string; } } $string = new StringableClass(); (new StringEater())->eat((string)$string); echo "\n\n"; printf($string); echo "\n\n"; (new StringEater())->eat($string);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.14, 8.4.16 - 8.4.17, 8.5.0 - 8.5.2
helloWorld Fatal error: Uncaught TypeError: printf(): Argument #1 ($format) must be of type string, StringableClass given in /in/lIB2j:25 Stack trace: #0 /in/lIB2j(25): printf(Object(StringableClass)) #1 {main} thrown in /in/lIB2j on line 25
Process exited with code 255.
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 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
helloWorld helloWorld Fatal error: Uncaught TypeError: Argument 1 passed to StringEater::eat() must be of the type string, object given, called in /in/lIB2j on line 27 and defined in /in/lIB2j:15 Stack trace: #0 /in/lIB2j(27): StringEater->eat(Object(StringableClass)) #1 {main} thrown in /in/lIB2j on line 15
Process exited with code 255.
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