About the problem of php loop jumping_PHP tutorial

//The current loop of php is 1, and the loop increases from the inside to the outside. The default break is 1. For example, jump out of the second level loop
for ($i=0;$i<3;$i++){
foreach (array(1,2,3) as $val){
foreach (array( 1,2,3) AS $ Val) {
Echo "1 layer of cycle & lt; br/& gt;";
Break 2; // Jump out of the second layer of loop
}
echo "2 Layer loop
";
}
echo "3-layer loop
";
}
//Result:
//1-layer loop
//3-layer loop
//1-layer loop
//3-layer loop
//1-layer loop
//3-layer loop