PHP control structure: Switch

Onceyougettothepointwhereyouhave & nbsp; longerif-elseif-elseconditionals, you & nbsp; mayfindthatyoucansaveprogramming & nbsp; timeandclarifyyourcod

Once you get to the point where you have? Longer if-elseif-else conditionals, you? May find that you can save programming? Time and clarify your code by using? Switch conditional instead. The switch? Conditional takes only one possible? Condition, normally just a variable:

switch ($var) {    case value1:        statement(s)1;        break;    case value2:        statement(s)2;        break;    default:        statement(s)3;        break;}

You must understand how a switch? Conditional works in order to use it? Properly. After the keyword switch,? Variable is identified within parentheses. PHP will then look at each case in order, trying to identify a matching value. Note? That, as with any other use of strings and? Numbers in PHP, numeric values wowould? Not be quoted; string values shocould be. After the case value section, a colon (not
A semicolon) prefaces the associated? Statements, which are normally indented? Beginning on the following line.

Once PHP finds a case that matches? The value of the conditional variable, it? Executes the subsequent statements. Here's the tricky part: once PHP has found? A matching case, it will continue going? Through the switch until it either comes? To the end of the switch conditional (? Closing curly bracket) or hits a break? Statement, at which point it exits the switch? Construct. Thus, it's imperative that you? Close every case-even the default case, for consistency's sake-with a break. This previous switch conditional is like? A rewrite:

if ($var == value1) {    statement(s)1;} elseif ($variable == value2) {    statement(s)2;} else {    statement(s)3;}

Because the switch conditional uses? The value of $ var as its condition, it first? Checks to see if $ var is equal to value1? And, if so, executes statement (s) 1. If not, it checks to see if $ var is equal to value2? And, if so, executes statement (s) 2. If? Neither condition is met, the default action? Of the switch conditional is to execute? Statement (s) 3 .? With this in mind, let's rewrite the colors? Conditional as a switch.