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@ 2021-12-25T11:52:10Z

<?php

function sov_find_key($findvalue, $array, $increment) {
    reset($array);
    $key = array_search($findvalue, $array);
    
    if ($key === false || $key === 0){
        return false;
    }
    
    if ($increment === 0){
        return $key;
    }
    
    $isNegative = $increment < 0 ? true:false;
    $increment = abs($increment);
    
    while(key($array) !== $key) {
        next($array);
    }
    
    $x=0;
    while($x < $increment) {
        if( $isNegative ){
            prev($array);
        } else {
            next($array);
        }
        $x++;
    }
    
    return key($array);
}

$findvalue = '3';

$array = array( 'A' => 'CONTRACTS',
			'B' => '1',
			'C' => '2',
			'D' => '3',
			'E' => '4',
			'F' => '5',
			'G' => '6');


echo sov_find_key($findvalue, $array, -1);

Output for git.master_jit, git.master, rfc.property-hooks: C

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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25.77 ms | 405 KiB | 5 Q