PHP : Basic syntax

PHP, or PHP: Hypertext Preprocessor, is a widely used, general-purpose scripting language that was originally designed for web development, to produce dynamic web pages. It can be embedded into HTML and generally runs on a web server, which needs to be configured to process PHP code and create web page content from it. It can be deployed on most web servers and on almost every operating system and platform free of charge.

•  Official PHP Homepage
  

PHP Basic	PHP Function
PHP Looping	PHP Condition statement

/* echo() function outputs one or more strings. */ echo "hello world"; //output hello world /* declaring variable */ $string = "world"; /* echoing variables */ $string = "world"; echo "hello ".$string; //output hello world	/* passing variable to functions */ function test($string) {           echo "hello ".$string; } test('world'); //output hello world /* returning values */ function add($number) {          return 1 + $number; } add(1); //output 2
/* user-defined fucntion */ function test(){ echo "hello world"; } /* calling user-defined fucntion */ test(); //output hello world /* returning values */ function add() { return 1 + 1; } add(); //output 2	$a = 1; $b = 2; /* if */ if ($a > $b)          echo "a is greater than b"; /* else */ if ($a > $b) {          echo "a is greater than b"; } else {          echo "a is NOT greater than b"; } /* elseif */ if ($a > $b) {          echo "a is greater than b"; } elseif ($a == $b) {          echo "a is equal to b"; } else {          echo "a is less than b"; } /* switch */ switch ($i) {          case 0:                   echo "i equals 0";                   break;          case 1:                   echo "i equals 1";                   break; case 2:                  echo "i equals 2";                  break; }
/* for loop */ for ($i = 1; $i <= 10; $i++) {          echo $i; } /* while loop */ $i = 1; while ($i <= 10) {          echo $i++; } /* do..while */ $i = 0; do {          echo $i; } while ($i > 0);   /* foreach */ $arr = array("1", "2", "3"); foreach ($arr as $value) {          echo "Value: $value\n"; } /* break */ break ends execution of the current for, foreach while, do..while or switch structure. break; /* continue */ continue is used within looping structures to skip the rest of the current loop iteration and continue execution at the beginning of the next iteration. continue;