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@ 2017-07-03T15:42:23Z

<?php

if (defined('HHVM_VERSION')) {
   exit('*HHVM skipped*');
}

function myErrorHandler($errno, $errstr, $errfile, $errline)
{
    if ($errno == E_NOTICE && in_array($errstr, array(
        'Undefined variable: undefined',
        'Undefined variable:  undefined',
    ), true)) {
        echo "\n";
        echo "Caught a Notice: Undefined variable: undefined in $errfile on line $errline\n";
        return true;
    }

    if ($errno == E_WARNING && in_array($errstr, array(
        'key() expects parameter 1 to be array, null given',
        'key(): Passed variable is not an array or object',
        'key() [http://www.php.net/function.key]: Passed variable is not an array or object',
    ), true)) {
        echo "\n";
        echo "(caught the warning about null not being an array in $errfile on line $errline)\n";
        return true;
    }

    return false;
}

set_error_handler('myErrorHandler');

// The following line will emit a notice if key() takes its parameter by value
key($undefined);

Output for git.master, git.master_jit, rfc.property-hooks: Warning: Undefined variable $undefined in /in/Eb8bc on line 34 Fatal error: Uncaught TypeError: key(): Argument #1 ($array) must be of type array, null given in /in/Eb8bc:34 Stack trace: #0 /in/Eb8bc(34): key(NULL) #1 {main} thrown in /in/Eb8bc on line 34
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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