Syntax example scan sheet for PHP.

php_up_to_speed.php

<?php
// php open tag

// class definition
class Person
{
    public $firstName;
    public $lastName;
    public $age;

    public function __construct($firstName, $lastName, $age)
    {
        $this->firstName = $firstName;
        $this->lastName = $lastName;
        $this->age = $age;
    }
}

// functions
function greet($name)
{
    return "Hello " . $name . "!";
}

// creating an instance of Person
$person1 = new Person("John", "Doe", 30);

// accessing fields of the class
echo "First Name: " . $person1->firstName . "\n";
echo "Last Name: " . $person1->lastName . "\n";
echo "Age: " . $person1->age . "\n";

// instance with field names
$person2 = new Person(firstName: "Alice", lastName: "Smith", age: 28);

$integerVar = 10;
$stringVar = "Hello, PHP!";

// functions
echo greet("World") . "\n";

// loops
// for loop
for ($i = 0; $i < 5; $i++) {
    echo "For loop iteration: " . $i . "\n";
}

// conditional statements
if ($integerVar > 5) {
    echo "Integer is greater than 5\n";
} elseif ($integerVar == 5) {
    echo "Integer is 5\n";
} else {
    echo "Integer is less than 5\n";
}

// conditional statements using switch
switch (true) {
    case $integerVar > 5:
        echo "Integer is greater than 5\n";
        break;
    case $integerVar == 5:
        echo "Integer is 5\n";
        break;
    default:
        echo "Integer is less than 5\n";
}

// data structures
$myArray = [1, 2, 3, 4, 5];
$myMap = ["a" => 1, "b" => 2];

// error handling
$fileHandle = @fopen("nonexistent_file.txt", "r");
if (!$fileHandle) {
    echo "Error opening file: " . error_get_last()["message"] . "\n";
}

// writing to a file
$content = "Writing to a file in PHP!";
file_put_contents("example.txt", $content);

// reading from a file
$data = file_get_contents("example.txt");
echo "File content: " . $data . "\n";

// close tag not required, but recommended

?>