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@ 2015-09-10T19:09:28Z

<?php

$dataFormat = array(
        "dateTimeOfData" => "DateTime",
        "open" => "double",
        "high" => "double",
        "low" => "double",
        "close" => "double",
        "volume" => "integer",
        "isCritical" => "boolean"//Temporary
    );

function validateFormat($data){
    //Check that all the required fields exist
    $missing = array_diff_key($dataFormat, $data);
    $extra = array_diff_key($data, $dataFormat);
    if(!empty($missing) || !empty($extra)){
        throw new InvalidArgumentException("Incorrect data format provided");
    }
    //Check that all the data is of the correct type
    foreach($data as $k => $v){
        $type = gettype($v) === "object" ? get_class($v) : gettype($v);
        $correctType = $dataFormat[$k];
        if($type !== $correctType){
            throw new InvalidArgumentException("Data is of an incorrect type.");
        }
    }
}
$arr = array("dateTimeOfData" => new DateTime(),
    "open" => 10.1,
    "high" => 10.1,
    "low" => 10.1,
    "close" => 10.1,
    "volume" => 10,
    "isCritical" => true);
validateFormat($arr);

Output for git.master, git.master_jit, rfc.property-hooks: Warning: Undefined variable $dataFormat in /in/qn14L on line 15 Fatal error: Uncaught TypeError: array_diff_key(): Argument #1 ($array) must be of type array, null given in /in/qn14L:15 Stack trace: #0 /in/qn14L(15): array_diff_key(NULL, Array) #1 /in/qn14L(36): validateFormat(Array) #2 {main} thrown in /in/qn14L on line 15
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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