Php 使用正则表达式将字符串拆分为句子
我将随机文本存储在Php 使用正则表达式将字符串拆分为句子,php,regex,unicode,nlp,Php,Regex,Unicode,Nlp,我将随机文本存储在$句子中。使用正则表达式,我想将文本拆分为句子,请参见: function splitSentences($text) { $re = '/ # Split sentences on whitespace between them. (?<= # Begin positive lookbehind. [.!?] # Either an end o
$句子中
。使用正则表达式,我想将文本拆分为句子,请参见:
function splitSentences($text) {
$re = '/ # Split sentences on whitespace between them.
(?<= # Begin positive lookbehind.
[.!?] # Either an end of sentence punct,
| [.!?][\'"] # or end of sentence punct and quote.
) # End positive lookbehind.
(?<! # Begin negative lookbehind.
Mr\. # Skip either "Mr."
| Mrs\. # or "Mrs.",
| T\.V\.A\. # or "T.V.A.",
# or... (you get the idea).
) # End negative lookbehind.
\s+ # Split on whitespace between sentences.
/ix';
$sentences = preg_split($re, $text, -1, PREG_SPLIT_NO_EMPTY);
return $sentences;
}
$sentences = splitSentences($sentences);
print_r($sentences);
或者这种情况:
$sentences = "Entertainment media properties. Fairy Tail and Tokyo Ghoul.";
当文本中存在unicode字符时,我可以做些什么使其工作
这是一个测试的例子
赏金信息
我正在寻找一个完整的解决方案。在发布答案之前,请阅读我与WiktorStribiżew的评论帖子,以了解有关此问题的更多相关信息
是将UTF-8字符U+00A0非中断空格打印到被解释为拉丁语-1的页面/控制台时的样子。所以我认为句子之间有一个不间断的空格,而不是一个正常的空格
\s
也可以匹配非中断空格,但您需要使用/u
修饰符告诉preg您正在向其发送UTF-8编码字符串。否则,它就像您的print命令一样,会猜测拉丁语-1,并将其视为两个字符
,正如预期的那样,任何自然语言处理都不是一项简单的任务。原因是它们是进化系统。没有一个人坐下来思考哪些是好主意,哪些不是。每个规则都有20-40%的例外。有了这一点,一个单一的正则表达式能够满足你的要求的复杂性将是不可能的。不过,下面的解决方案主要依赖于正则表达式
- 我们的想法是逐步复习课文
- 在任何给定的时间,文本的当前块将包含在两个不同的部分中。一个是句子边界前的子串候选,另一个是后面的子串候选
- 前10个正则表达式对检测看起来像句子边界但实际上不是的位置。在这种情况下,在没有注册新句子的情况下,提前执行before和after
- 如果这些对都不匹配,将尝试与最后3对匹配,可能检测到边界
至于这些正则表达式来自哪里我翻译了,这是根据。如果你真的想了解他们,除了阅读报纸别无选择
就准确性而言,我鼓励你用不同的文本来测试它。经过一些实验,我感到非常惊喜
在性能方面-正则表达式应该具有很高的性能,因为它们都有\a
或\Z
锚定,几乎没有重复量词,在有重复量词的地方-不可能有任何回溯。不过,正则表达式是正则表达式。如果你打算在大块的文本上使用这个is紧循环,你必须做一些基准测试
强制性免责声明:请原谅我生疏的php技能。下面的代码可能不是有史以来最惯用的php代码,它应该仍然足够清晰,可以让人理解这一点
功能句\u拆分($text){
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“/(?:(?:[\.\s]\p{L}{1,2}.\s))\Z/su',,
“/(?:(?:[\[\(]*\.\.\.\.[\]\)]*)\Z/su”,
“/(?:(?:)\b(?:pp |[Vv]iz | i\?\s*e |[Vvol]|[Rr]col | maj |[Ff]igs |[Vv]iz |[Vv]ols |[Aa]pprox |[Ii]ncl | Pres ept |[Dd ept | min | max |[Gg t]ovs | | s | | s | | s | | | | s | | | s | s |,
“/(?:(?:\b[Ee]tc\.\s))\Z/su”,
“/(?:(?:[\.!?…]+\p{Pe})|(?:[\[\(]*…[\]\])]]*)\Z/su',
“/(?:(?:\b\p{L}\)\Z/su',
“/(?:(?:\b\p{L}\.\s))\Z/su”,
“/(?:(?:\b[Ff]igs?\.\s);(?:\b[nN]o\.\s))\Z/su”,
“/(?:(?:[\”“\”]\s*)\Z/su”,
“/(?:(?:[\.!?…])[\x{00BB}\x{2019}\x{201D}\x{203A}\”\'\p{Pe}\x{0002}]*\s);(?:\r?\n))\Z/su',
“/(?:(?:[\.!?…][\”\x{00BB}\x{2019}\x{201D}\x{203A}\p{Pe}\x{0002}]*)\Z/su',
“/(?:(?:\s\p{L}[\.!?…]\s))\Z/su”);
$after_regexes=数组('/\A(?)/su',
'/\A(?[\p{N}\p{Ll}])/su',,
'/\A(?[^\p{Lu}])/su',,
“/\A(?[^\p{Lu}]|I)/su”,
'/\A(?[^p{Lu}])/su',,
'/\A(?:\p{Ll})/su',,
'/\A(?:\p{L}\)/su',,
'/\A(?:\p{L}\.\s)/su',,
'/\A(?:\p{N})/su',,
'/\A(?:\s*\p{Ll})/su',,
“/\A(?)/su”,
'/\A(?:\p{Lu}[^\p{Lu}])/su',,
'/\A(?:\p{Lu}\p{Ll})/su');
$is_句子_边界=数组(false,false,false,false,false,false,false,false,false,true,true);
$count=13;
$句子=数组();
$句子='';
$before='';
$after=substr($text,0,10);
$text=substr($text,10);
而($text!=''){
对于($i=0;$i<$count;$i++){
if(preg_match($before_regex[$i],$before)和&preg_match($before_regex[$i],$after)){
如果($is_session_boundary[$i]){
数组_push($句子,$句子);
$句子='';
}
打破
}
}
$first_from_text=$text[0];
$text=substr($text,1);
$first\u from\u after=$after[0];
$after=substr($after,1);
$before.=$first\u from\u after;
$SENTURE.=$first\u from\u after;
$after.=$first\u from\u text;
}
如果($SECTION!=''&&$after!=''){
数组_push($句子,$句子.$after);
}
返回$SECTIONS;
}
$text=“Mr.Entertainment media properties.仙女尾巴3.5和东京食尸鬼。”;
打印(句子分割($text));
如果空格不可靠
$sentences = "Entertainment media properties. Fairy Tail and Tokyo Ghoul.";
function sentence_split($text) {
$before_regexes = array('/(?:(?:[\'\"„][\.!?…][\'\"”]\s)|(?:[^\.]\s[A-Z]\.\s)|(?:\b(?:St|Gen|Hon|Prof|Dr|Mr|Ms|Mrs|[JS]r|Col|Maj|Brig|Sgt|Capt|Cmnd|Sen|Rev|Rep|Revd)\.\s)|(?:\b(?:St|Gen|Hon|Prof|Dr|Mr|Ms|Mrs|[JS]r|Col|Maj|Brig|Sgt|Capt|Cmnd|Sen|Rev|Rep|Revd)\.\s[A-Z]\.\s)|(?:\bApr\.\s)|(?:\bAug\.\s)|(?:\bBros\.\s)|(?:\bCo\.\s)|(?:\bCorp\.\s)|(?:\bDec\.\s)|(?:\bDist\.\s)|(?:\bFeb\.\s)|(?:\bInc\.\s)|(?:\bJan\.\s)|(?:\bJul\.\s)|(?:\bJun\.\s)|(?:\bMar\.\s)|(?:\bNov\.\s)|(?:\bOct\.\s)|(?:\bPh\.?D\.\s)|(?:\bSept?\.\s)|(?:\b\p{Lu}\.\p{Lu}\.\s)|(?:\b\p{Lu}\.\s\p{Lu}\.\s)|(?:\bcf\.\s)|(?:\be\.g\.\s)|(?:\besp\.\s)|(?:\bet\b\s\bal\.\s)|(?:\bvs\.\s)|(?:\p{Ps}[!?]+\p{Pe} ))\Z/su',
'/(?:(?:[\.\s]\p{L}{1,2}\.\s))\Z/su',
'/(?:(?:[\[\(]*\.\.\.[\]\)]* ))\Z/su',
'/(?:(?:\b(?:pp|[Vv]iz|i\.?\s*e|[Vvol]|[Rr]col|maj|Lt|[Ff]ig|[Ff]igs|[Vv]iz|[Vv]ols|[Aa]pprox|[Ii]ncl|Pres|[Dd]ept|min|max|[Gg]ovt|lb|ft|c\.?\s*f|vs)\.\s))\Z/su',
'/(?:(?:\b[Ee]tc\.\s))\Z/su',
'/(?:(?:[\.!?…]+\p{Pe} )|(?:[\[\(]*…[\]\)]* ))\Z/su',
'/(?:(?:\b\p{L}\.))\Z/su',
'/(?:(?:\b\p{L}\.\s))\Z/su',
'/(?:(?:\b[Ff]igs?\.\s)|(?:\b[nN]o\.\s))\Z/su',
'/(?:(?:[\"”\']\s*))\Z/su',
'/(?:(?:[\.!?…][\x{00BB}\x{2019}\x{201D}\x{203A}\"\'\p{Pe}\x{0002}]*\s)|(?:\r?\n))\Z/su',
'/(?:(?:[\.!?…][\'\"\x{00BB}\x{2019}\x{201D}\x{203A}\p{Pe}\x{0002}]*))\Z/su',
'/(?:(?:\s\p{L}[\.!?…]\s))\Z/su');
$after_regexes = array('/\A(?:)/su',
'/\A(?:[\p{N}\p{Ll}])/su',
'/\A(?:[^\p{Lu}])/su',
'/\A(?:[^\p{Lu}]|I)/su',
'/\A(?:[^p{Lu}])/su',
'/\A(?:\p{Ll})/su',
'/\A(?:\p{L}\.)/su',
'/\A(?:\p{L}\.\s)/su',
'/\A(?:\p{N})/su',
'/\A(?:\s*\p{Ll})/su',
'/\A(?:)/su',
'/\A(?:\p{Lu}[^\p{Lu}])/su',
'/\A(?:\p{Lu}\p{Ll})/su');
$is_sentence_boundary = array(false, false, false, false, false, false, false, false, false, false, true, true, true);
$count = 13;
$sentences = array();
$sentence = '';
$before = '';
$after = substr($text, 0, 10);
$text = substr($text, 10);
while($text != '') {
for($i = 0; $i < $count; $i++) {
if(preg_match($before_regexes[$i], $before) && preg_match($after_regexes[$i], $after)) {
if($is_sentence_boundary[$i]) {
array_push($sentences, $sentence);
$sentence = '';
}
break;
}
}
$first_from_text = $text[0];
$text = substr($text, 1);
$first_from_after = $after[0];
$after = substr($after, 1);
$before .= $first_from_after;
$sentence .= $first_from_after;
$after .= $first_from_text;
}
if($sentence != '' && $after != '') {
array_push($sentences, $sentence.$after);
}
return $sentences;
}
$text = "Mr. Entertainment media properties. Fairy Tail 3.5 and Tokyo Ghoul.";
print_r(sentence_split($text));
function splitSentences($text) {
$re = '/ # Split sentences ending with a dot
.+? # Match everything before, until we find
(
$ | # the end of the string, or
\. # a dot
(?<! # Begin negative lookbehind.
Mr\. # Skip either "Mr."
| Mrs\. # or "Mrs.",
# or... (you get the idea).
) # End negative lookbehind.
"? # Optionally match a quote
\s* # Any number of whitespaces
(?= # Begin positive lookahead
\p{Lu} | # an upper case letter, or
" # a quote
)
)
/iux';
if (!preg_match_all($re, $text, $matches, PREG_PATTERN_ORDER)) {
return [];
}
$sentences = array_map('trim', $matches[0]);
return $sentences;
}
$text = "Mr. Entertainment media properties. Fairy Tail 3.5 and Tokyo Ghoul.";
$sentences = splitSentences($text);
print_r($sentences);
<?php
require_once 'classes/autoloader.php'; // Include the autoloader.
$text = "Hello there, Mr. Smith. What're you doing today... Smith,"
. " my friend?\n\nI hope it's good. This last sentence will"
. " cost you $2.50! Just kidding :)"; // This is the test text we're going to use
$Sentence = new Sentence; // Create a new instance
$sentences = $Sentence->split($text); // Split into array of sentences
$count = $Sentence->count($text); // Count the number of sentences
?>
<?php
include ('vendor/autoload.php');
use \NlpTools\Tokenizers\ClassifierBasedTokenizer;
use \NlpTools\Tokenizers\WhitespaceTokenizer;
use \NlpTools\Classifiers\ClassifierInterface;
use \NlpTools\Documents\DocumentInterface;
class EndOfSentence implements ClassifierInterface
{
public function classify(array $classes, DocumentInterface $d) {
list($token,$before,$after) = $d->getDocumentData();
$dotcnt = count(explode('.',$token))-1;
$lastdot = substr($token,-1)=='.';
if (!$lastdot) // assume that all sentences end in full stops
return 'O';
if ($dotcnt>1) // to catch some naive abbreviations U.S.A.
return 'O';
return 'EOW';
}
}
$tok = new ClassifierBasedTokenizer(
new EndOfSentence(),
new WhitespaceTokenizer()
);
$text = "We are what we repeatedly do.
Excellence, then, is not an act, but a habit.";
print_r($tok->tokenize($text));
// Array
// (
// [0] => We are what we repeatedly do.
// [1] => Excellence, then, is not an act, but a habit.
// )
$txt = preg_replace('~\p{P}+~', "$0 ", $txt);
<?php
function splitSentences($text) {
$re = '/# Split sentences on whitespace between them.
(?<= # Begin positive lookbehind.
[.!?] # Either an end of sentence punct,
| [.!?][\'"] # or end of sentence punct and quote.
) # End positive lookbehind.
(?<! # Begin negative lookbehind.
Mr\. # Skip either "Mr."
| Mrs\. # or "Mrs.",
| Ms\. # or "Ms.",
| Jr\. # or "Jr.",
| Dr\. # or "Dr.",
| Prof\. # or "Prof.",
| Vol\. # or "Vol.",
| A\.D\. # or "A.D.",
| B\.C\. # or "B.C.",
| Sr\. # or "Sr.",
| T\.V\.A\. # or "T.V.A.",
# or... (you get the idea).
) # End negative lookbehind.
\s+ # Split on whitespace between sentences.
/uix';
$sentences = preg_split($re, $text, -1, PREG_SPLIT_NO_EMPTY);
return $sentences;
}
$sentences = 'Entertainment media properties. Ã Fairy Tail and Tokyo Ghoul. Entertainment media properties. Â Fairy Tail and Tokyo Ghoul.';
$sentences = splitSentences($sentences);
print_r($sentences);
\s+ # Split on whitespace between sentences.