[英]php variable variables to access property of an object
I want to store an property->object name in a table and access in code. 我想在表中存储一个property-> object name并在代码中访问。
What is the proper way to accomplish the following. 什么是完成以下任务的正确方法。
$patient = new stdClass();
$patient->patient_number = '12345';
$cls = 'patient';
$prp = 'patient_number';
echo 'test1 = ' . $patient->patient_number . '<br>';
//--- this prints 12345 as expected;
echo 'test2 = ' . $$cls->patient_number . '<br>';
//--- this print 12345 as expected;
echo 'test3 = ' . $$cls->${$prp} . '<br>';
//--- this generates undefined variable patient_number;
用这个:
echo 'test3 = ' . ${$cls}->{$prp} . '<br>';
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