Online PHP editor | output for OZF61

@ 2019-01-25T19:30:39Z

<?php
    // prelim
    $object = new stdClass;
    $object->field = 10;
    $param = new stdClass;
    $param->object = $object;
    
    // ternary variant     
    $field = !($param && $param->object)?:  $param->object->field;
    echo $field,"\n";
    
    // alternative to ANDing
    $field = get_object_vars( $param->object )["field"] ?? null;
    echo $field,"\n";

Output for 7.1.25, 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: 10 10
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 10 10

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