Final PHP Examples

Created Friday 21 April 2017

If:

<?php


$value = 14;

if ($value < 12 )
	{ 
		echo "the value is LESS than 12";
	}
else 
	{	
		echo "it's MORE than 12";
}


echo "<br>and we're done";

Another if:

<?php

 //Notice the lack of { } for one-line blocks of if/else code.
 $age = 6;

 $playground_min_age = 5;
 $playground_max_age = 12;

 if ($age < $playground_min_age)
  echo "You are too young to play on the playground.  Go away!";
 elseif ($age > $playground_max_age)
   echo "You are too old to play on the playground.  Weirdo.";
 else
   echo "You can come play on the playground";

?

for:

<?php

 $count = 15;

  for ($i = 0; $i < $count; $i++)
  {
    echo "<li>FOR STYLE! We are on $i in this loop!</li>";
  }

?>

Arrays:

<?php

// This creates the array AND puts values in simultaneously
$myColors = array("red","green","blue");

// Adds element:
$myColors[] = "yellow";

// Arrays are indexed at zero
echo "The thing indexed at 0 is $myColors[0] <br>";

echo "Lets try this: <br>";

foreach ( $myColors as $eachcolor ) {

echo "<p style=\"color:$eachcolor;\"> I like this color </p>";

echo "\n";

}

Array Functions

<?php

//Let us first setup some simple arrays:
$bad_ac_dorms = array("Dorman", "Smith", "McCollum", "Rogers", "Kellum", "Reynolds");
$cruddy_dorms = array("Smith", "Kellum", "Reynolds", "Landis", "Degraff", "Cawthon");


//Try to keep your variable names shorter than this...
$dorms_both_cruddy_and_with_bad_ac = array_intersect($bad_ac_dorms, $cruddy_dorms);

//Note the lazy way to print an array below
echo "The following dorms are cruddy and have bad ac:";
print_r($dorms_both_cruddy_and_with_bad_ac);
echo "<br>";

Associative Arrays

<?php

  //My associative array

$marvel = array ( 	"Iron Man" => "Earth",
			"Thor" => "Asgard",
                        "Hulk" => "Earth",
                        "Loki" => "Asgard",
                        "Captain America" => "Earth",
                        "Hawkeye" => "Earth");

// echo "Iron Man is from " . $marvel["Iron Man"];

echo "<br>";

foreach($marvel as $character => $homeplace) 
{
	if ($homeplace == "Earth"){
		echo "$character is human <br>";
	}
	elseif ($homeplace == "Asgard"){
		echo "$character is alien or something<br>";
	}
	else {
		echo "I DONT EVEN KNOW WHATS GOING ON"; // IF WE SEE THIS SOMETHING IS VERY VERY WRONG. 
	}
}

?>

Nested arrays

<?php

$ships = array();

$ships["Nebuchadnezzar"] = array("Captain" => "Morpheus" , "First Mate" => "Trinity");
$ships["Logos"] = array("Captain" => "Niobe",  "First Mate" => "Ghost");
$ships["Osiris"] = array("Captain" => "Thadeus" , "First Mate" => "Jue");
$ships["Caduceus"] = array("Captain" => "Ballard" , "First Mate" => "Malachi");

//Let us print a HTML table out of this:
echo "<table>";
echo "<tr>";
echo "<th>Ship name</th>";
echo "<th>Captain</th>";
echo "<th>First Mate</th>";
echo "</tr>";

foreach($ships as $currShip => $currShipAtts)
{
  echo "<tr>";
  echo "<td>$currShip</td>";
  echo "<td> {$currShipAtts["Captain"]} </td>";
  echo "<td> {$currShipAtts["First Mate"]} </td>";
  echo "</tr>";
}

echo "</table>";

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