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<?php $names = preg_grep('/^JSON_ERROR/', array_keys(get_defined_constants())); $errors = array_combine(array_map("constant", $names), $names); var_dump(json_decode('{"":123}'), $errors[json_last_error()]); var_dump(json_decode(""), $errors[json_last_error()]);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1
object(stdClass)#1 (1) { [""]=> int(123) } string(15) "JSON_ERROR_NONE" NULL string(17) "JSON_ERROR_SYNTAX"
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 7.0.0 - 7.0.33
object(stdClass)#1 (1) { ["_empty_"]=> int(123) } string(15) "JSON_ERROR_NONE" NULL string(17) "JSON_ERROR_SYNTAX"
Output for 5.6.0 - 5.6.40
object(stdClass)#1 (1) { ["_empty_"]=> int(123) } string(15) "JSON_ERROR_NONE" NULL string(15) "JSON_ERROR_NONE"

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