//php The current loop is 1 , the loop increases from the inside out, break The default is 1 , such as jumping out of the box 2 Layer circulation
for ($i=0;$i<3;$i++){
foreach (array(1,2,3) as $val){
foreach (array(1,2,3) as $val){
echo "1 Layer circulation <br/>";
break 2; // Jump out of the first 2 Layer circulation
}
echo "2 Layer circulation <br/>";
}
echo "3 Layer circulation <br/>";
}
// Results:
//1 Layer circulation
//3 Layer circulation
//1 Layer circulation
//3 Layer circulation
//1 Layer circulation
//3 Layer circulation