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

过程化风格

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

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

参数

formatter: The IntlDateFormatter object.
string: String to convert to a time.
offset: Position at which to start the parsing in string (zero-based). On return, offset holds the position at which parsing ended, whether or not the parse succeeded. If offset is negative or greater than strlen($string), the parse fails immediately and offset is left unchanged.

返回值

An associative array of integers whose keys are those of localtime(), with the hour given on a 24-hour clock in tm_hour 或者在失败时返回 false. Note that tm_yday is 1-based here, whereas localtime() returns it 0-based.

示例

示例 #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 at 4:00:00 PM Pacific Standard Time', $offset);

echo 'First parsed output is ';
if ($arr) {
    foreach ($arr as $key => $value) {
        echo "$key : $value , ";
    }
}

?>

示例 #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 at 4:00:00 PM Pacific Standard Time', $offset);

echo 'First parsed output is ';
if ($arr) {
    foreach ($arr as $key => $value) {
        echo "$key : $value , ";
    }
}

?>

以上示例会输出：

First parsed output is tm_sec : 0 , tm_min : 0 , tm_hour : 16 , tm_year : 69 ,
tm_mday : 31 , tm_wday : 3 , 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

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＋添加备注

用户贡献的备注 2 notes

down

Patanjali ¶

9 years ago

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
 ...
}
?>

down

Patanjali ¶

9 years ago

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
 ...
}
?>