IntlDateFormatter::localtime

datefmt_localtime

(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)

IntlDateFormatter::localtime -- datefmt_localtime — Parse string to a field-based time value

说明

面向对象风格

public IntlDateFormatter::localtime ( string $string , int &$offset = null ) : array|false

过程化风格

datefmt_localtime ( IntlDateFormatter $formatter , string $string , int &$offset = null ) : array|false

Converts string $value to a field-based time value ( an array of various fields), starting at $parse_pos and consuming as much of the input value as possible.

参数

formatter

The formatter resource

string

string to convert to a time

offset

Position at which to start the parsing in $value (zero-based). If no error occurs before $value is consumed, $parse_pos will contain -1 otherwise it will contain the position at which parsing ended . If $parse_pos > strlen($value), the parse fails immediately.

返回值

Localtime compatible array of integers : contains 24 hour clock value in tm_hour field, 或者在失败时返回 false.

范例

Example #1 datefmt_localtime() example

<?php

$fmt = datefmt_create(
    'en_US',
    IntlDateFormatter::FULL,
    IntlDateFormatter::FULL,
    'America/Los_Angeles',
    IntlDateFormatter::GREGORIAN
);
$arr = datefmt_localtime($fmt, 'Wednesday, December 31, 1969 4:00:00 PM PT', 0);
echo 'First parsed output is ';
if ($arr) {
    foreach ($arr as $key => $value) {
        echo "$key : $value , ";
    }
}

?>

Example #2 OO example

<?php
$fmt = new IntlDateFormatter(
    'en_US',
    IntlDateFormatter::FULL,
    IntlDateFormatter::FULL,
    'America/Los_Angeles',
    IntlDateFormatter::GREGORIAN
);
$arr = $fmt->localtime('Wednesday, December 31, 1969 4:00:00 PM PT', 0);
echo 'First parsed output is ';
if ($arr) {
    foreach ($arr as $key => $value) {
        echo "$key : $value , ";
    }
}

?>

以上例程会输出：

First parsed output is tm_sec : 0 , tm_min : 0 , tm_hour : 16 , tm_year : 1969 , 
tm_mday : 31 , tm_wday : 4 , tm_yday : 365 , tm_mon : 11 , tm_isdst : 0 ,

参见

User Contributed Notes

Patanjali 04-Mar-2017 11:19
Learning lesson here: Never trust the PHP documentation. Test everything!

$position does not work as described, at least in PHP 7. After parsing without errors, it does not contain -1.

You can still use it to set the parsing start character position, but not necessarily whether any errors occurred.

To test for errors, replace my $nPosition test code in the other note with:
<?php
// Check if errors
$bError = intl_is_failure(datefmt_get_error_code(oIDF));

// If no error
if(!$bError){
 // Use 'tm_hour' and 'tm_min' from the $aTime array for checking against other time values
 ...
}else{
 // Invalid string
 ...
}
?>
Patanjali 04-Mar-2017 03:55
You can use datefmt_localtime to convert a user's time string, input using their locale's script, into standard numbers for checking, using a simple HTML input element.

This avoids using clunky HTML select elements formatted with hour and minute options in the locale's script to capture user input.

<?php
// Specify locale of user
$sLocale = 'en-us'; // US English user
$sLocale = 'ar-ye'; // Yemen Arab user

// Create a date formatter for the user's locale
$oIDF = datefmt_create($sLocale, IntlDateFormatter::NONE, IntlDateFormatter::SHORT);

// Simulate a user's time input string
$sTime = datefmt_format($oIDF, ['tm_hour'=>15, 'tm_min'=>25]);
// For a US English user, $sTime = '3:25 PM'
// For a Yemen Arab user, $sTime = '?:?? ?'

// Specify datefmt_locale parsing start at the beginning of the user input
$nPosition = 0;

// Convert input time string to array of standard numeric values, as per localtime() output (http://php.net/manual/en/function.localtime.php)
$aTime = datefmt_localtime($oIDF, $sTime, $nPosition);
// If no errors, $nPosition set to -1 after parsing, else character position of error

// If valid string
if($nPosition = -1){
 // Use 'tm_hour' and 'tm_min' from the $aTime array for checking against other time values
 ...
}else{
 // Invalid string
 ...
}
?>
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