locutus/esm/php/array/array_keys.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

import { normalizeArrayKey } from "../_helpers/_phpTypes.js";
export function array_keys(input, searchValue, argStrict) {
    //      discuss at: https://locutus.io/php/array_keys/
    // parity verified: PHP 8.3
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //        input by: Brett Zamir (https://brett-zamir.me)
    //        input by: P
    //     bugfixed by: Kevin van Zonneveld (https://kvz.io)
    //     bugfixed by: Brett Zamir (https://brett-zamir.me)
    //     improved by: jd
    //     improved by: Brett Zamir (https://brett-zamir.me)
    //       example 1: array_keys( {firstname: 'Kevin', surname: 'van Zonneveld'} )
    //       returns 1: [ 'firstname', 'surname' ]
    const search = typeof searchValue !== 'undefined';
    const tmpArr = [];
    const strict = !!argStrict;
    let include = true;
    for (const [key, value] of Object.entries(input)) {
        include = true;
        if (search) {
            if (strict && value !== searchValue) {
                include = false;
            }
            else if (value !== searchValue) {
                include = false;
            }
        }
        if (include) {
            tmpArr.push(normalizeArrayKey(key));
        }
    }
    return tmpArr;
}