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there is one more expression that may seem odd if you haven't seen it in other languages, the ternary conditional operator:
in addition to being shorter and clearer, this also results in faster execution.

if statements can be nested indefinitely within other if statements, which provides you with complete flexibility for conditional execution of the various parts of your program.
if statements can be nested indefinitely within other if statements, which provides you with complete flexibility for conditional execution of the various parts of your program.

the if construct is one of the most important features of many languages, php included. it allows for conditional execution of code fragments. php의 if 문은 c와 비슷하다.:
if expr evaluates to true, php will execute statement, and if it evaluates to false - it 'll ignore it.

a very common type of expressions are comparison expressions. these expressions evaluate to either 0 or 1, meaning false or true (respectively). php supports (bigger than), = (bigger than or equal to), == (equal), != (not equal), (smaller than) and = (smaller than or equal to). these expressions are most commonly used inside conditional execution, such as if statements.
post-increment, which is written '$variable++' evaluates to the original value of $variable, before it was incremented (php increments the variable after reading its value, thus the name'post-increment').