PHP.md

Import

require_once '../resources/vendors/meekro/db.class.php';

Data Types

Number, Float

$x = 1;
$x = 1.5;

String

$x = 'Hello' . ' ' . 'World';

Boolean

$x = true;
$x = false;

Indexed Array

$x = ("Volvo","BMW","Mercedes")
echo $[0]; // Volvo.
echo $[1]: // BMW.
echo $[2]: // Mercedes.

Associative Arrays

$myArray["user1"] = array("firstName"=>"John", "lastName"=>"Doe");
$myArray = array("firstName"=>"John", "lastName"=>"Doe");

Object

$x->color = "Red";
$x->type = "Car";
$x->brand = "BMW";

Null

$x = null;

Variables

$varName;

Constants

define("CONSTANT_NAME", "This is my value.");

Operators

$x + $y;
$x - $y;
$x * $y;
$x / $y;
$x % $y;
$x %% $y; // Exponent.
$x = $y;
$x += $y;
$x -= $y;
$x *= $y;
$x /= $y;
$x %= $y;
$x == $y;
$x === $y; // Identical value and type.
$x != $y;
$x <> $y;
$x !== $y; // Not identical value or type.
$x <=> $y; // Spaceship.
++$x;
$x++;
--$x;
$x--;
and
or
xor
&&
||
! // Not

Conditions & Loops

if-elseif-else

if (condition) {
	// Code
} elseif (condition) {
	// Code
} else {
	// Code
}

Ternary Shorthand

$result = $initial ?: 'final';

Isset Ternary (Null Colescing)

Wiki

$result = $initial ?? 'final';

Loops

while
do...while
for
foreach

Function

function functionName(int $argument = 5) {
	// Code
	return $result;
}

function functionName(&$argument) { // Pass argument by reference
	// Code
	return $result;
}

Superglobal Variables

$_POST["name"] // Obtains the HTTP post variables.
$_GET["name"] // Obtains the HTTP get variables.
$_SESSION["login"] // Obtains the session variables.

More Here

Built-In Methods

session_start(); // Starts new or resume existing session.
echo myString; // Output a string.
print(); // Output a formatted string.
header("Location: <path>"); // Redirect to path
json_encode(); // Returns JSON representation of a value.
preg_replace(); // Perform regular expression search and replace.
preg_match(); // Perform a regular expression match.

Sample Code

require_once '../resources/vendors/meekro/db.class.php';
DB::$error_handler = 'error'; // runs on mysql query errors
DB::$nonsql_error_handler = 'error'; // runs on library errors (bad syntax, etc)
$result = db::queryFirstRow("SELECT * FROM records where uuid = %s", $record_uuid);
DB::query("INSERT INTO records_archive SELECT * FROM records WHERE uuid = %s", $data->uuid);
DB::delete("records", "uuid=%s", $data->uuid);
DB::insert('records', [
	'uuid' => $data->uuid,
	'tenant_uuid' => "44f2e162-7992-11ea-8bb6-ace4718a5f3d", /** REFACTOR */
	'config_uuid' => $data->config_uuid,
	'config_code' => $data->config_code,
	'object' => $data->object,
	'json' => json_encode($data->json),
	'timestamp' => DB::sqleval("NOW()")
]);