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<?php var_dump(json_encode([0.00000000120023021301])); $a = (string) 0.00000000120023021301; var_dump($a); $b = 0.00000000120023021301; var_dump(number_format($b, 24));
Output for git.master, git.master_jit, rfc.property-hooks
string(18) "[1.20023021301e-9]" string(16) "1.20023021301E-9" string(26) "0.000000001200230213010000"

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