PHP implementation today is the day of the week

Today is the day of the week in many ways, this article has compiled three commonly used, interested friends can understand The code is as follows:
// Method 1
$ Da = date ("w ");
If ($ da = "1 "){
Echo "Today is Monday ";
} Else if ($ da = "2 "){
Echo "Today is Tuesday ";
} Else if ($ da = "3 "){
Echo "Today is Wednesday ";
} Else if ($ da = "4 "){
Echo "Today is Thursday ";
} Else if ($ da = "5 "){
Echo "Today is Friday ";
} Else if ($ da = "6 "){
Echo "Today is Saturday ";
} Else if ($ da = "0 "){
Echo "Today is Sunday ";
} Else {
Echo "Your input is incorrect !! ";
};
// Method 2
$ Ga = date ("w ");
Switch ($ ga ){
Case 1: echo "Today is Monday"; break;
Case 2: echo "Today is Tuesday"; break;
Case 3: echo "Today is Wednesday"; break;
Case 4: echo "Today is Thursday"; break;
Case 5: echo "Today is Friday"; break;
Case 6: echo "Today is Saturday"; break;
Case 0: echo "Today is Sunday"; break;
Default: echo "Your input is incorrect! ";
};
// Method 3

Echo "today is the week". mb_substr ("May 25, 1234", date ("w"), 1, "UTF-8 ");