IntlDateFormatter::localtime()

datefmt_localtime

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

Parse string to a field-based time value

说明

面向对象风格
publicIntlDateFormatter::localtime(string $value[,int &$position]): array

过程化风格
datefmt_localtime(IntlDateFormatter$fmt,string $value[,int &$position]): array

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

$fmt

The formatter resource

$value

string to convert to a time

$position

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

范例

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 , ";
    }
}
?>

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

• datefmt_create() Create a date formatter
• datefmt_format() Format the date/time value as a string
• datefmt_parse() Parse string to a timestamp value
• datefmt_get_error_code() Get the error code from last operation
• datefmt_get_error_message() Get the error text from the last operation

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
 ...
}
?>

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 = '٣:٢٥ م'
// 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
 ...
}
?>