diff --git a/arrays.php b/arrays.php
new file mode 100644
index 0000000..6648d8a
--- /dev/null
+++ b/arrays.php
@@ -0,0 +1,28 @@
+<?php
+
+$array = ["hello", "how", "are", "you", "?"];
+print_r ($array);
+echo "<br>";
+
+$array2 = [1, 2, 3.5, 4, 5.5];
+print_r ($array2);
+echo "<br>";
+
+$array3 = [["hello" , "and", "welcome"], ["how", "are", "you", "?"]];
+print_r ($array3);
+echo "<br>";
+
+echo "length: ", count($array);
+echo "<br>";
+
+$arrayMerge = array_merge($array3, $array);
+print_r ($arrayMerge);
+echo "<br>";
+
+echo "last element of the first array is: ", end($array);
+echo "<br>";
+
+array_push($array, "Hello");
+print_r ($array);
+
+?>
\ No newline at end of file
diff --git a/conditionals.php b/conditionals.php
new file mode 100644
index 0000000..d8ad0cb
--- /dev/null
+++ b/conditionals.php
@@ -0,0 +1,60 @@
+<?php
+
+$currentDate = new DateTime();
+if(date(format: "D") == "Mon"){
+    echo "we are in monday";
+    echo "<br>";
+}
+
+if(date(format: "M") == "Oct"){
+    echo "we are in October";
+    echo "<br>";
+} else {
+    echo date(format: "F");
+    echo "<br>";
+}
+
+if(date(format: "i") < 10){
+    echo "the current minute is less than 10";
+    echo "<br>";
+} else if (date(format: "i") > 15){
+    echo "the current minute is more than 15";
+    echo "<br>";
+} else {
+    echo "does not meet any condition";
+    echo "<br>";
+}
+
+$switchDate = date(format: "N");
+switch ($switchDate){
+    case 1:
+        echo "Hey! It's Monday";
+        echo "<br>";
+        break;
+    case 2:
+        echo "Hey! It's Tuesday";
+        echo "<br>";
+        break;
+    case 3:
+        echo "Hey! It's Wednesday";
+        echo "<br>";
+        break;
+    case 4:
+        echo "Hey! It's Thursday";
+        echo "<br>";
+        break;
+    case 5:
+        echo "Hey! It's Friday";
+        echo "<br>";
+        break;
+    case 6:
+        echo "Hey! It's Saturday";
+        echo "<br>";
+        break;
+    case 7:
+        echo "Hey! It's Sunday";
+        echo "<br>";
+        break;
+
+}
+?>
\ No newline at end of file
diff --git a/dates.php b/dates.php
new file mode 100644
index 0000000..de490d5
--- /dev/null
+++ b/dates.php
@@ -0,0 +1,13 @@
+<?php
+$date = new DateTime();
+echo $date->format('Y-M-d');
+echo "<br>";
+echo date(format: "y-m-d");
+echo "<br>";
+echo date(format: "D");
+echo "<br>";
+echo date(format: "m");
+echo "<br>";
+echo date('i');
+
+?>
\ No newline at end of file
diff --git a/functions.php b/functions.php
new file mode 100644
index 0000000..481b827
--- /dev/null
+++ b/functions.php
@@ -0,0 +1,43 @@
+<?php
+
+
+function sum($x, $y) {
+    return $x + $y;
+}
+echo "2 + 3 = ";
+echo sum(2, 3);
+echo "<br>";
+
+function multi($x, $y) {
+    return $x * $y;
+}
+echo "2 * 3 = ";
+echo multi(2, 3);
+echo "<br>";
+
+function div($x, $y) {
+    return $x / $y;
+}
+echo "2 / 3 = ";
+echo div(2, 3);
+echo "<br>";
+
+function chooseOp($y, $x, $operando) {
+    if ($operando === "+") {
+      return $y + $x;
+    }else if ($operando === "-") {
+        return $y - $x;
+    }else if ($operando === "*") {
+        return $y * $x;
+    }else if ($operando === "/") {
+        return $y / $x;
+    }else if ($operando === "%") {
+        return $y % $x;
+    }else if ($operando === "**") {
+        return $y ** $x;
+    }
+}
+echo "2 ** 3 = ";
+echo chooseOp(2, 3, "**");
+echo "<br>";
+?>
\ No newline at end of file
diff --git a/iterators.php b/iterators.php
new file mode 100644
index 0000000..c9a5175
--- /dev/null
+++ b/iterators.php
@@ -0,0 +1,41 @@
+<?php
+$i = 0;
+for($i = 0; $i < 4; $i++){
+    echo "i in for is: ";
+    print_r ($i);
+    echo "<br>";
+}
+
+echo "<br>";
+
+$array = array(1, 2, 3, 4);
+echo "array before forEach: ";
+print_r ($array);
+echo "<br>";
+foreach ($array as &$valor) {
+    $valor++;
+}
+//unset($valor); 
+
+echo "array after forEach: ";
+print_r ($array);
+
+echo "<br>", "<br>";
+
+$j = 0;
+while($j<10){
+    echo "j in while is: $j";
+    echo "<br>";
+    $j++;
+}
+
+echo "<br>";
+
+$k = 0;
+do{
+    echo "k in do while is: $k";
+    echo "<br>";
+    $k++;
+}while($k < 10);
+
+?>
\ No newline at end of file
diff --git a/math.php b/math.php
new file mode 100644
index 0000000..53f5970
--- /dev/null
+++ b/math.php
@@ -0,0 +1,25 @@
+<?php
+echo "absolute value of -5: ";
+$num = abs(-5);
+echo "$num";
+echo "<br>";
+
+$rounded = round(6.5);
+echo "6.5 rounded is: ";
+echo "$rounded";
+echo "<br>";
+
+$maxNum = max(2, 3, 4, 5);
+echo "the max number between 2, 3, 4, and 5 is: ";
+echo $maxNum;
+echo "<br>";
+
+$minNum = min(2, 3, 4, 5);
+echo "the min number between 2, 3, 4, and 5 is: ";
+echo $minNum;
+echo "<br>";
+
+echo "random number between 1 and 10: ";
+echo rand(1, 10);
+echo "<br>";
+?>
\ No newline at end of file
diff --git a/operators.php b/operators.php
new file mode 100644
index 0000000..d6a9311
--- /dev/null
+++ b/operators.php
@@ -0,0 +1,74 @@
+<?php
+$var1 =2;
+$var2 = 3;
+$var3 = 5;
+$bool1 = true;
+$bool2 = true;
+$bool3 = false;
+
+$var4 = $var1 + $var2;
+echo "2 + 3 = ";
+print_r($var4);
+
+echo "<br>";
+
+$var4 = $var1 - $var2;
+echo "2 - 3 = ";
+print_r($var4);
+
+echo "<br>";
+
+$var4 = $var1 * $var2;
+echo "2 * 3 = ";
+print_r($var4);
+
+echo "<br>";
+
+$var4 = $var1 / $var2;
+echo "2 / 3 = ";
+print_r($var4);
+
+echo "<br>";
+
+echo "1 = 2? ";
+var_dump(1 == 2);
+
+echo "<br>";
+echo "1 != 2?";
+var_dump(1 != 2);
+
+echo "<br>";
+echo "1 < 2? ";
+var_dump(1 < 2);
+
+echo "<br>";
+echo "1 > 2? ";
+var_dump(1 > 2);
+
+echo "<br>";
+echo "1 <= 2? ";
+var_dump(1 <= 2);
+
+echo "<br>";
+echo "1 >= 2? ";
+var_dump(1 >= 2);
+echo "<br>";
+
+echo "true && true: ";
+var_dump($bool1 && $bool2);
+echo "<br>";
+
+echo "true || false:  ";
+var_dump($bool1 || $bool3);
+echo "<br>";
+
+echo "!false: ";
+var_dump(!$bool3);
+echo "<br>";
+
+echo "true XOR false: ";
+var_dump($bool1 xor $bool3);
+echo "<br>";
+
+
+?>
\ No newline at end of file
diff --git a/phpinfo.php b/phpinfo.php
new file mode 100644
index 0000000..d7c3469
--- /dev/null
+++ b/phpinfo.php
@@ -0,0 +1,4 @@
+<?php
+
+phpinfo();
+?>
\ No newline at end of file
diff --git a/print.php b/print.php
new file mode 100644
index 0000000..04f2e8d
--- /dev/null
+++ b/print.php
@@ -0,0 +1,9 @@
+<?php
+
+echo "This is an echo instruction", "<br>", "this is also an echo instruction";
+echo "<br>";
+print "this is a print instruction"; 
+echo "<br>";
+$a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z'));
+print_r ($a);
+?>
\ No newline at end of file
diff --git a/strings.php b/strings.php
new file mode 100644
index 0000000..386007e
--- /dev/null
+++ b/strings.php
@@ -0,0 +1,39 @@
+<?php
+
+echo "this is a printed string";
+echo "<br>";
+
+$a = "this is a string printed with a variable";
+print_r ($a);
+echo "<br>";
+
+echo "{$a} and concatenated with text";
+echo "<br>";
+
+$strin = "I like Lasagna";
+print_r(str_replace("Lasagna", "Pasta", $string));
+echo "<br>";
+
+$string = "I like Lasagna";
+print_r(str_ireplace("lasagNA", "pasta", $string));
+echo "<br>";
+
+$repeatString = "hello <br>";
+echo str_repeat($repeatString, 10);
+
+$stringLength = "This is a string";
+echo strlen($stringLength);
+echo "<br>";
+
+echo strpos("This is a string", "string");
+echo "<br>";
+
+$anotherString = "this is yet another string";
+echo strtoupper($anotherString);
+echo "<br>";
+
+echo strtolower($anotherString);
+echo "<br>";
+
+echo substr($anotherString, 11);
+?>
\ No newline at end of file
diff --git a/types.php b/types.php
new file mode 100644
index 0000000..753309c
--- /dev/null
+++ b/types.php
@@ -0,0 +1,32 @@
+<?php
+$bool = true;
+var_dump($bool);
+echo "<br>";
+
+$int = 5;
+var_dump($int);
+echo "<br>";
+
+$float = 5.0;
+var_dump($float);
+echo "<br>";
+
+$string = "hello";
+var_dump($string);
+echo "<br>";
+
+$array = [1, 2, 3];
+var_dump($array);
+echo "<br>";
+
+$object = (object) [
+    'propertyOne' => 'foo',
+    'propertyTwo' => 42,
+  ];
+var_dump($object);
+echo "<br>";
+
+$null;
+var_dump($null);
+echo "<br>";
+?>
\ No newline at end of file