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<?php $arraydata = array('foo' => 3.0, 'bar' => 3.1); $jsondata = json_encode($arraydata); var_dump($arraydata); var_dump(json_encode($arraydata)); var_dump(json_encode($arraydata, JSON_PRESERVE_ZERO_FRACTION)); var_dump(json_decode($jsondata, true));
Output for 5.6.6 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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 - 8.3.4, 8.3.6
array(2) { ["foo"]=> float(3) ["bar"]=> float(3.1) } string(19) "{"foo":3,"bar":3.1}" string(21) "{"foo":3.0,"bar":3.1}" array(2) { ["foo"]=> int(3) ["bar"]=> float(3.1) }
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 array(2) { ["foo"]=> float(3) ["bar"]=> float(3.1) } string(19) "{"foo":3,"bar":3.1}" string(21) "{"foo":3.0,"bar":3.1}" array(2) { ["foo"]=> int(3) ["bar"]=> float(3.1) }
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.5
array(2) { ["foo"]=> float(3) ["bar"]=> float(3.1) } string(19) "{"foo":3,"bar":3.1}" Notice: Use of undefined constant JSON_PRESERVE_ZERO_FRACTION - assumed 'JSON_PRESERVE_ZERO_FRACTION' in /in/IKLPU on line 7 Warning: json_encode() expects parameter 2 to be long, string given in /in/IKLPU on line 7 NULL array(2) { ["foo"]=> int(3) ["bar"]=> float(3.1) }

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