PHP (operators, statements, functions)

Mathematical operators

string concatenation : with "."

$a = "Hello"; $b = "World"; Echo $a. $b;

Comparison operators

logical operators

&& and, | | Or! Non -

Other

Error suppressor

Notice Note

Warning warning

Error errors

Ternary operators

$a true ; Echo $a? " Male ":" Female ";

Sequential statements

Branch Statement : If,

$a = ten; if ($a>10) {    echo "a greater than ten";} Else {    echo "A is less than or equal to ten";    }

Switch case

$a= 2;Switch($a) {     Case0:Echo"0000";  Break;  Case1:Echo"1111";  Break;  Case2:Echo"2222";  Break; default:Echo"AAAAA"; }

Looping statements

For loop

 for ($i= 1; $i<10; $i+ +)    {echo "Hello world<br>"    ;}

While loop

$a = 0;      while ($a<10) {        echo "Hello world<br>";         $a+ +;        }

Function

function Test () {        echo "Hello World";        }    Test ();

Functions with parameters

function Test ($a,$b) {        echo$a+$b;        }    Test (10,5);

A function with a return value that accepts the return value of the method with a variable

function Test ($a,$b) {        return$a+$b ;        }     $sum=test (10,5);     Echo $sum;

Functions with variable parameters

        function Test () {        $arrfunc_get_args();         Var_dump ($arr);        }    Test (1,2,3,4,5);

Accumulation

functionTest () {$arr=Func_get_args(); $sum= 0;  for($i= 0;$i<Count($arr);$i++){            $sum=$sum+$arr[$i]; }        return $sum; }    EchoTest (1,2,3,4,5);

Functions with default values

function Test ($a= "AA") {        echo "name: {$a}";        }    Test ();

Output to

Switch

function Test ($a= "AA") {        echo "name: {$a}";        }    Test ("BB");

Output:

a few important functions :

1. Random number function

Echo Rand ();

Generates random numbers in a range, echo rand(0,10), random numbers from 0 to 10 range

2. Get the current time (timestamp)

Echo time ();

3. Formatting timestamps

echo date("Y-m-d h:i:s",Time ()); Note: The default value is the current time

4. Encode the date time as a timestamp

echo strtotime("2017-2-3 17:12:23");

PHP (operators, statements, functions)