PHP condition judgment

{Code ...}

  1. 'name' => 'gao mou', 'company' => 'a company'); while (list ($ A, $ B) = each ($ contact )) {echo $. "". $ B.'
';}?> In this Code, I am not quite clear about the while condition judgment (why do I directly write list ($ a, $ B) = each ($ contact ), is the condition determined based on the return value of the function ??

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  1. 'name' => 'gao mou', 'company' => 'a company'); while (list ($ A, $ B) = each ($ contact )) {echo $. "". $ B.'
';}?> In this Code, I am not quite clear about the while condition judgment (why do I directly write list ($ a, $ B) = each ($ contact ), is the condition determined based on the return value of the function ??

Each-returns the current key/value pair in the array and moves the array pointer one step forward. If the internal pointer crosses the end of the array, each () returns FALSE. So while exits.
Document attached: http://php.net/manual/zh/function.each.php

For more information, seeeachDescription:

Http://php.net/manual/zh/function.each.php

= Is a value assignment. Assign the value on the right to the left. While to determine whether the value on the left is true

Http://php.net/manual/zh/function.each.php