locutus
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Locutus other languages' standard libraries to JavaScript for fun and educational purposes
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JavaScript
export function gmmktime(hour, minute, second, month, day, year) {
// discuss at: https://locutus.io/php/gmmktime/
// parity verified: PHP 8.3
// original by: Brett Zamir (https://brett-zamir.me)
// original by: mktime
// example 1: gmmktime(14, 10, 2, 2, 1, 2008)
// returns 1: 1201875002
// example 2: gmmktime(0, 0, -1, 1, 1, 1970)
// returns 2: -1
const d = new Date();
const resolved = [
d.getUTCHours(),
d.getUTCMinutes(),
d.getUTCSeconds(),
d.getUTCMonth() + 1, // +1 to fix JS months.
d.getUTCDate(),
d.getUTCFullYear(),
];
const input = [hour, minute, second, month, day, year];
for (let i = 0; i < input.length; i++) {
const value = input[i];
if (typeof value !== 'undefined') {
const parsed = Number.parseInt(String(value), 10);
if (Number.isNaN(parsed)) {
return false;
}
resolved[i] = parsed;
}
}
// Map years 0-69 to 2000-2069 and years 70-100 to 1970-2000.
const normalizedYear = resolved[5] + (resolved[5] >= 0 ? (resolved[5] <= 69 ? 2000 : resolved[5] <= 100 ? 1900 : 0) : 0);
// Set year, month (-1 to fix JS months), and date.
// !This must come before the call to setHours!
d.setUTCFullYear(normalizedYear, resolved[3] - 1, resolved[4]);
// Set hours, minutes, and seconds.
d.setUTCHours(resolved[0], resolved[1], resolved[2]);
const time = d.getTime();
// Divide milliseconds by 1000 to return seconds and drop decimal.
// Add 1 second if negative or it'll be off from PHP by 1 second.
return ((time / 1e3) >> 0) - Number(time < 0);
}