Foreach循环 ======= foreach 循环只适用于数组，并用于遍历数组中的每个键/值对。 foreach ($array as $value) { code to be executed; } ~~~ $colors = array("red","green","blue","yellow"); foreach ($colors as $value) { echo "$value <br>"; } ~~~ ~~~ $age=array("Bill"=>"35","Steve"=>"37","Peter"=>"43"); foreach($age as $x=>$x_value) { echo "Key=" . $x . ", Value=" . $x_value; echo "<br>"; } ~~~