PHP for loop is very similar to a while loop in that it continues to process a block of code until a statement becomes false, and everything is defined in a single line.
The?foreach loop?is mainly used for looping through the values of an array. It loops over the array, and each value for the current array element is assigned to $value, and the array pointer is advanced by one to go the next element in the array.
2019-03-16
foreach 可用于關聯和索引數組，它是自動遞增訪問指針（從開始到結束）；
for則用于自定義地訪問；(包括start,end,step）
引用 w3school:
PHP for loop is very similar to a while loop in that it continues to process a block of code until a statement becomes false, and everything is defined in a single line.
The?foreach loop?is mainly used for looping through the values of an array. It loops over the array, and each value for the current array element is assigned to $value, and the array pointer is advanced by one to go the next element in the array.