diff --git a/arrays.php b/arrays.php
new file mode 100644
index 0000000..4e83d50
--- /dev/null
+++ b/arrays.php
@@ -0,0 +1,37 @@
+<?php
+
+$arrayString = array("uno","dos","cuatro","cinco");
+print_r($arrayString);
+echo "<br>";
+
+$arrayNumbers = array(1,2,4,5);
+$arrayNumbers2 = array(5,2,2,2);
+print_r($arrayNumbers);
+echo "<br>";
+
+$arrayMultidimentsional = array(1,array(9,8,7),4,5.3);
+print_r($arrayMultidimentsional);
+echo "<br>";
+
+echo count($arrayMultidimentsional);
+echo "<br>";
+
+print_r(array_merge($arrayString,$arrayNumbers));
+echo "<br>";
+print_r(array_combine($arrayString,$arrayNumbers));
+echo "<br>";
+print_r(array_intersect($arrayNumbers2,$arrayNumbers));
+echo "<br>";
+print_r(array_diff($arrayNumbers2,$arrayNumbers));
+echo "<br>";
+// print_r(array_count_values($arrayNumbers2,$arrayNumbers));
+// echo "<br>";
+
+print_r(end($arrayNumbers));
+echo "<br>";
+
+array_push($arrayNumbers,8);
+print_r($arrayNumbers);
+echo "<br>";
+
+?>
\ No newline at end of file
diff --git a/conditionals.php b/conditionals.php
new file mode 100644
index 0000000..e59b868
--- /dev/null
+++ b/conditionals.php
@@ -0,0 +1,44 @@
+<?php
+$date = date("w");
+
+if ($date == 1 ) {
+    echo "We are on Monday";
+}
+
+$dateMonth = new dateTime("NOW");
+
+
+if ($dateMonth -> format("M") == "Oct"){
+    echo "We are in October";
+}else {
+    print $dateMonth -> format("M")."<br>";
+}
+
+$minute = date("i");
+
+if ($minute < 10 ){
+    echo "The current minute is less than 10"."<br>";
+}else if ($minute > 15 ){
+    echo "the current minute is more than 15"."<br>";
+}else{
+    echo "does not meet any conditions"."<br>";
+}
+
+$dayWeek = date("w");
+
+switch ($dayWeek) {
+    case 0:
+        echo "Monday"."<br>";
+        break;
+    case 1:
+        echo "Tuesday"."<br>";
+        break;
+    case 2:
+        echo "Wednesday"."<br>";
+        break;
+    case 3:
+        echo "Thursday"."<br>";
+        break;
+}
+
+?>
\ No newline at end of file
diff --git a/dates.php b/dates.php
new file mode 100644
index 0000000..5a11ecb
--- /dev/null
+++ b/dates.php
@@ -0,0 +1,9 @@
+<?php
+
+$fecha = new DateTime("NOW");
+echo $fecha -> format('Y-m-d')."<br>";
+echo $fecha -> format('d')."<br>";
+echo $fecha -> format('m')."<br>";
+echo $fecha -> format('i')."<br>";
+
+?>
\ No newline at end of file
diff --git a/functions.php b/functions.php
new file mode 100644
index 0000000..021c59c
--- /dev/null
+++ b/functions.php
@@ -0,0 +1,50 @@
+<?php
+
+function suma($arg_1,$arg_2){
+    echo "Funcion de ejemplo";
+    return print($arg_1 + $arg_2);
+    }
+    
+    suma(3,5);
+    echo "<br>";
+    
+function plus($arg_1,$arg_2){
+    echo "Funcion de ejemplo";
+    return print($arg_1 * $arg_2);
+    }
+    
+    plus(2,5)
+    echo "<br>";
+    
+function div($arg_1,$arg_2){
+     echo "Funcion de ejemplo";
+    return print($arg_1 / $arg_2);
+    }
+    
+    div(30,2);
+    echo "<br>";
+    
+    
+function multi($arg_1,$arg_2,$variable){
+    switch ($variable) {
+        case 'suma':
+            suma($arg_1,$arg_2);
+            break;
+        case 'plus':
+            plus($arg_1,$arg_2);
+            break;
+        case 'div':
+            div($arg_1,$arg_2);
+            break;
+        }
+        return $arg_1 / $arg_2;
+        }
+    
+multi (1,2,"suma");
+echo "<br>";
+multi (5,2,"plus");
+echo "<br>";
+multi (10,2,"div");
+echo "<br>";
+
+?>
\ No newline at end of file
diff --git a/iterators.php b/iterators.php
new file mode 100644
index 0000000..62a2575
--- /dev/null
+++ b/iterators.php
@@ -0,0 +1,33 @@
+<?php
+
+//for
+
+for($alphabet = "A"; $alphabet != "AA"; $alphabet++) {
+    echo $alphabet . " ";
+} // This loop shows us the entire alphabet.
+
+echo "<hr>";
+
+$numeros = array (1,2,3,4);
+
+foreach ($numeros as &$value)
+
+    print "the number is: $value <br>";
+
+$x=0;
+while ($x < 10){
+    print "the number is $x <br>";
+    $x++;
+}
+
+echo "<hr>";
+
+$y=10;
+do{
+    print "the number is $y <br>";
+    $y--;
+}
+while($y > 0);
+
+
+?>
\ No newline at end of file
diff --git a/maths.php b/maths.php
new file mode 100644
index 0000000..667549a
--- /dev/null
+++ b/maths.php
@@ -0,0 +1,9 @@
+<?php
+echo(abs(-6.7) . "<br>");
+echo(ceil(6.3) . "<br>");
+echo(max(6.3,5,4,20) . "<br>");
+echo(min(6.3,5,4,20) . "<br>");
+echo(rand(2,20) . "<br>");
+$random = rand(10,100);
+echo$random. "<br>";
+?>
\ No newline at end of file
diff --git a/operators.php b/operators.php
new file mode 100644
index 0000000..2f5e1ca
--- /dev/null
+++ b/operators.php
@@ -0,0 +1,73 @@
+<?php
+
+$x = 10;  
+$y = 6;
+
+echo $x + $y."<br>"; 
+echo $x - $y."<br>";
+echo $x * $y."<br>";
+echo $x / $y."<br>";
+echo $x % $y."<br>";
+
+$a = 20;
+$b = 21;
+
+if( $a == $b ) {
+  echo "a and b is equal<br>";
+}else {
+  echo "a is not equal to b <br>";
+}
+if( $a === $b ) {
+  echo "a and b is equal<br>";
+}else {
+  echo "a is not equal to b<br>";
+}
+if( $a != $b ) {
+  echo "a and b is diferent<br>";
+}else {
+  echo "a is equal to b<br>";
+}
+if( $a < $b ) {
+    echo "a is smaller than b <br>";
+  }else {
+    echo "b is smaller than a <br>";
+  }
+if( $a > $b ) {
+    echo "a is bigger than b <br>";
+  }else {
+    echo "b is bigger than a <br>";
+  }
+if( $a <= $b ) {
+    echo "a is smaller or equal than b <br>";
+  }else {
+    echo "b is smaller or equal than a <br>";
+  }
+if( $a >= $b ) {
+    echo "a is bigger or equal than b <br>";
+  }else {
+    echo "b is bigger or equal than a <br>";
+  }
+if ($x == 10 and $y == 6) {
+    echo "Hello world! <br>";
+}
+if ($x == 10 && $y == 6) {
+    echo "Hello world! <br>";
+}
+if ($x == 10 || $y == 5) {
+    echo "Hello world! <br>";
+}
+if ($x == 10 or $y == 5) {
+    echo "Hello world! <br>";
+}
+if ($x == 10 && $y == 6) {
+    echo "Hello world! && <br>";
+}
+if (! ($x==9) ) {
+    echo "Hello world! water <br>";
+}
+if ($x == 10 xor $y == 5) {
+    echo "Hello world! xor <br>";
+}
+
+
+?>
\ No newline at end of file
diff --git a/phpinfo.php b/phpinfo.php
new file mode 100644
index 0000000..968c8df
--- /dev/null
+++ b/phpinfo.php
@@ -0,0 +1,3 @@
+<?php
+phpinfo();
+?>
\ No newline at end of file
diff --git a/print.php b/print.php
new file mode 100644
index 0000000..d049db3
--- /dev/null
+++ b/print.php
@@ -0,0 +1,45 @@
+<?php
+
+//Instruction that makes use of "echo"
+
+echo "This is a test with echo.", "\n", "<br>"; // "\n" means line feed (avance de línea)
+
+echo 'This ', 'string ', 'was ', 'made ', 'with multiple parameters.', "\n", "<br>";
+
+echo 'This ' . 'string ' . 'was ' . 'made ' . 'with concatenation.' . "\n" . "<br>"; // . is used to concatenate
+
+echo "Hello ", isset($name) ? $name : "Pau Tomás", "!" , "<br>";
+
+$example = "The argument can be any expression";
+echo "$example which produces a string", "<br>";
+
+$sports = ["tenis", "padel", "football", "basketball"];
+echo "My favourite sports are " . implode(", ", $sports) . "..." . "<br>"; // implode — Join array elements with a string
+
+echo 3 * 12;
+echo "<hr>";
+
+//Instruction that makes ude of "print"
+
+print "This is a test with print. <br>"; 
+
+$example = "The argument can be any expression";
+print "$example which produces a string <br>";
+
+$sports = ["tenis", "padel", "football", "basketball"];
+print implode(", ", $sports);
+
+print "<br>";
+print 6 * 7;
+print "<hr>";
+
+
+//Instruction that makes use of "print_r" — Prints human-readable information about a variable
+
+echo "<pre>";
+$a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z'));
+
+print_r ($a);
+echo "</pre>";
+
+?>
\ No newline at end of file
diff --git a/strings.php b/strings.php
new file mode 100644
index 0000000..74a6591
--- /dev/null
+++ b/strings.php
@@ -0,0 +1,31 @@
+<?php
+    echo "Hello\n";
+
+    $world = "World!\n";
+    echo "$world";
+
+    echo "Hello $world\n";
+
+    $cat = "Cat\n";
+    echo str_ireplace("c", "b", $cat);
+
+    echo str_replace("C", "b", $cat);
+
+    $hello = "Hello";
+    echo str_repeat($hello . "\n", 5);
+
+    $length = "length\n";
+    echo strlen($length);
+
+    $str = "hello\n";
+    echo strpos($str, "o");
+
+    echo ucfirst($str);
+
+    $strToLow = "Hello\n";
+    echo strtolower($strToLow);
+
+    $text = "Hello, how are you?";
+    $find = substr($text, 7, 3);
+    echo $find;
+?>
\ No newline at end of file
diff --git a/types.php b/types.php
new file mode 100644
index 0000000..c7a3194
--- /dev/null
+++ b/types.php
@@ -0,0 +1,54 @@
+<?php
+// type string
+$a = "Hello world!";
+var_dump($a);
+echo '<br><br>';
+
+// type integer
+$b = 5985;
+var_dump($b);
+echo '<br><br>';
+
+// type float
+$c = 10.365;
+var_dump($c);
+echo '<br><br>';
+
+// type boolean
+$d = true;
+var_dump($d);
+echo '<br><br>';
+
+// null
+$e = null;
+var_dump($e);
+
+// type array
+$cars = array("Volvo", "BMW", "Toyota");
+var_dump($cars);
+echo '<br><br>';
+
+// type object (class)
+class Car
+{
+  public $color;
+  public $model;
+  public function __construct($color, $model)
+  {
+    $this->color = $color;
+    $this->model = $model;
+  }
+  public function message()
+  {
+    return "My car is a " . $this->color . " " . $this->model . "!";
+  }
+}
+
+$myCar = new Car("black", "Volvo");
+echo $myCar->message();
+echo "<br>";
+$myCar = new Car("red", "Toyota");
+echo $myCar->message();
+echo '<br><br>';
+
+?>
\ No newline at end of file