如果你拥有马力,你可以try以下算法。 我举一个例子,把ted的工作留给你:

//Attempt to perform strtotime() on each contiguous subset of words...

//1st iteration
strtotime("Gadzooks, is it 17th June already")
strtotime("is it 17th June already")
strtotime("it 17th June already")
strtotime("17th June already")
strtotime("June already")
strtotime("already")

//2nd iteration
strtotime("Gadzooks, is it 17th June")
strtotime("is it 17th June")
strtotime("17th June") //date!
strtotime("June") //date!

//3rd iteration
strtotime("Gadzooks, is it 17th")
strtotime("is it 17th")
strtotime("it 17th")
strtotime("17th") //date!

//4th iteration
strtotime("Gadzooks, is it")
//etc

我们可以假设,strtotime ("17th June")比strtotime (“17th”)更为准确,因为它含有更多的词语......即“next日星期五”总是比“Friday”更准确。

我这样做:

第一次检查,如果整个护卫期为有效日期。 如果是的话,你又做了。

如果不是的话,就确定你在座的字数(例如白天)。 让这一数字为零。

选择每个一字的组合和使用方言,看该短语是否有效。 如果是的话,你会发现你在原体内所显示的最长有效日期。

如果不是的话,则每两字的组合和使用方言,看该短语是否有效。 如果是的话,你会发现你在原体内所显示的最长有效日期。

......并如此,直到你找到一个有效的日期,说明或搜查每一个单词/个人字。 通过找到最长的对应办法,你获得最知情的日期(如果是这样的话)。 由于你重新处理信条,你的说法永远不会是巨大的。

在Juan Cortes利用Doloph s算法的断裂环节的激励下,我走过前面并写了自己。 请注意,我决定先成功回来。

<?php
function extractDatetime($string) {
    if(strtotime($string)) return $string;
    $string = str_replace(array(" at ", " on ", " the "), " ", $string);
    if(strtotime($string)) return $string;

    $list = explode(" ", $string);
    $first_length = count($list);
    for($j=0; $j < $first_length; $j++) {
        $original_length = count($list);
        for($i=0; $i < $original_length; $i++) {
            $temp_list = $list;
            for($k = 0; $k < $i; $k++) unset($temp_list[$k]);
            //echo "<code>".implode(" ", $temp_list)."</code><br/>"; // for visualizing the tests, if you want to see it
            if(strtotime(implode(" ", $temp_list))) return implode(" ", $temp_list);
        }
        array_pop($list);
    }

    return false;
}

Inputs

$array = array(
        "Gadzooks, is it 17th June already",
        "I’m going to play croquet next Friday",
        "Where was the dog yesterday at 6 PM?",
        "Where was Steve on Monday at 7am?"
);

foreach($array as $a) echo "$a => ".extractDatetime(str_replace("?", "", $a))."<hr/>";

Outputs

Gadzooks, is it 17th June already
is it 17th June already
it 17th June already
17th June already
June already
already
Gadzooks, is it 17th June
is it 17th June
it 17th June
17th June
Gadzooks, is it 17th June already => 17th June
-----
I’m going to play croquet next Friday
going to play croquet next Friday
to play croquet next Friday
play croquet next Friday
croquet next Friday
next Friday
I’m going to play croquet next Friday => next Friday
-----
Where was Rav Four yesterday 6 PM
was Rav Four yesterday 6 PM
Rav Four yesterday 6 PM
Four yesterday 6 PM
yesterday 6 PM
Where was the Rav Four yesterday at 6 PM? => yesterday 6 PM
-----
Where was Steve Monday 7am
was Steve Monday 7am
Steve Monday 7am
Monday 7am
Where was Steve on Monday at 7am? => Monday 7am
-----

类似might :

$months = array(
                    "01" => "January", 
                    "02" => "Feberuary", 
                    "03" => "March", 
                    "04" => "April", 
                    "05" => "May", 
                    "06" => "June", 
                    "07" => "July", 
                    "08" => "August", 
                    "09" => "September", 
                    "10" => "October", 
                    "11" => "November", 
                    "12" => "December"
                );

$weekDays = array(
                    "01" => "Monday", 
                    "02" => "Tuesday", 
                    "03" => "Wednesday", 
                    "04" => "Thursday", 
                    "05" => "Friday", 
                    "06" => "Saturday", 
                    "07" => "Sunday"
                );

foreach($months as $value){
    if(strpos(strtolower($string),strtolower($value))){
        \ extract and assign as you like...
    }
}

http://www.un.org/Depts/DGACM/index_french.htm