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<?php echo json_encode(array('a' => 'sbi/1', 'b' => 2.00, 'c' => '0272561313', 'd' => 4200123, 'e' => 5, 'f' => '4200123'), JSON_UNESCAPED_SLASHES|JSON_PRESERVE_ZERO_FRACTION|JSON_BIGINT_AS_STRING); ?>
Output for 5.6.6 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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, 8.3.0 - 8.3.6
{"a":"sbi/1","b":2.0,"c":"0272561313","d":4200123,"e":5,"f":"4200123"}
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.5
Notice: Use of undefined constant JSON_PRESERVE_ZERO_FRACTION - assumed 'JSON_PRESERVE_ZERO_FRACTION' in /in/ErSYE on line 3 {"a":"sbi/1","b":2,"c":"0272561313","d":4200123,"e":5,"f":"4200123"}

preferences:
169.46 ms | 402 KiB | 223 Q