rurtubia · November 6, 2015 00:03
diff --git a/case_sensitivity.php b/case_sensitivity.php
 <!DOCTYPE HTML>
 <HTML>
  <BODY>
    <?php
      #in php, keywords, classes, functions and user-defined functions are Non-Case Sensitive:
      ECHO "hi<br>";
      Echo "hi<br>";
      echo "hi<br>";
      
      #However, all variables are Case Sensitive:
      $color = "red";
      $COLOR = "blue";
      $Color = "green";
      echo "My house is " .  $color . ", your house is " . $COLOR . " and his house is " . $Color;
    ?>
  </BODY>
 </HTML>
diff --git a/comments.php b/comments.php
 <!Doctype HTML>
 <HTML>
  <BODY>
    <?php
      echo "Hello World";
      // single line comment style 1
      # single line comment style 2
      /*
        multi-line comment
      */
      $x = 5 + /*5 +*/ 5; //inline-comment.
    ?>
  </BODY>
 </HTML>
diff --git a/hello_world.php b/hello_world.php
 <!Doctype HTML>
 <HTML>
  <BODY>
    <?php
      echo "Hello World";
    ?>
  </BODY>
 </HTML>
diff --git a/static _variables.php b/static _variables.php
 <!DOCTYPE HTML>
 <HTML>
  <BODY>
    <?php
      function function1(){
        
        //Static variables can keep their value after execution.
        
        static $x = 1;
        echo $x;
        echo "<br>";
        $x++;
        }
        
        function1();
        function1();
        function1();
        function1();
        function1();
    ?>
  </BODY>
 </HTML>
	<!DOCTYPE HTML>
	<HTML>
	<BODY>
	<?php
	#in php, keywords, classes, functions and user-defined functions are Non-Case Sensitive:
	ECHO "hi<br>";
	Echo "hi<br>";
	echo "hi<br>";

	#However, all variables are Case Sensitive:
	$color = "red";
	$COLOR = "blue";
	$Color = "green";
	echo "My house is " . $color . ", your house is " . $COLOR . " and his house is " . $Color;
	?>
	</BODY>
	</HTML>