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<?php $str = '{ "key": "Hi!" }invalid'; $data = json_decode($str, true); if (JSON_ERROR_NONE === json_last_error()) { echo 'Invalid!'; } else { echo 'Valid'; }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Valid
Output for 5.2.3 - 5.2.17
Fatal error: Call to undefined function json_last_error() in /in/vVmZb on line 5
Process exited with code 255.
Output for 5.2.0 - 5.2.2
<br /> <b>Fatal error</b>: Call to undefined function json_last_error() in <b>/in/vVmZb</b> on line <b>5</b><br />
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
<br /> <b>Fatal error</b>: Call to undefined function json_decode() in <b>/in/vVmZb</b> on line <b>4</b><br />
Process exited with code 255.
Output for 4.4.5 - 4.4.9
<br /> <b>Fatal error</b>: Call to undefined function: json_decode() in <b>/in/vVmZb</b> on line <b>4</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
<br /> <b>Fatal error</b>: Call to undefined function: json_decode() in <b>/in/vVmZb</b> on line <b>4</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1
<br /> <b>Fatal error</b>: Call to undefined function: json_decode() in <b>/in/vVmZb</b> on line <b>4</b><br />

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