php是用1-3个单词来分解句子的简单方法吗？

php是用1-3个单词来分解句子的简单方法吗

$str = 'Wikipedia was launched on January 15, 2001.';
$str = preg_replace('/[[:punct:]]/i',' ',$str);
$parts = explode(' ',trim($str));

现在我想说出这样的话。谢谢

$output_array={
"Wikipedia",
"was",
"launched",
"on",
"January",
"15",
"2001", //one word
"Wikipedia was",
"launched on",
"January 15",
"was launched",
"on January",
"15 2001", //two nearby words.
"Wikipedia was launched",
"on January 15",
"was launched on",
"January 15 2001",
"launched on January",
"on January 15" //three nearby words.
}

$parts=explode（''，preg_replace（'/[:punct:]]/i'，''，''，$str））；
$output_array=array（）；
对于（$words=1；$words Hmmm…看起来你正在尝试建立自己的全文索引。在我看来，到目前为止你做得很好。我想你必须重新运行数组$parts，跳过3个元素来创建一个新字符串。我不知道是否还有其他方法。也许正则表达式可能有一些解决方案，但我不太确定。set
$max=3；
仅获取
array（1）{[0]=>string（9）“Wikipedia”}
您还可以直接获取包含
preg\u split（'/\W+/'，$str，-1，preg\u split\u NO\u EMPTY）；
是的，这是替换explode/preg\u replace:）的建议）
$parts = explode(' ',preg_replace('/[[:punct:]]/i','',$str));
$output_array = array();
for ($words = 1; $words <= $max; $words++)
    for ($wordIndex = 0; $wordIndex <= count($parts) - $words; $wordIndex++)
        $output_array[] = implode(" ", array_slice($parts, $wordIndex, $words));