PHP 字符串的字长密度/计数计算

Question

给定文本，我如何计算单词长度的密度/计数，以便得到如下输出

• 1 个字母单词：52 / 1%
• 2 个字母单词：34 / 0.5%
• 3 个字母单词：67 / 2%

找到这个但对于 python

• 计算 a 中的单词长度文件
• 按字长索引

Answer 1

您可以首先使用 explode()< 将文本拆分为单词。 /strong> （作为一个非常/太简单的解决方案） 或 preg_split() （允许使用更强大的东西）：

$text = "this is some kind of text with several words";
$words = explode(' ', $text);

Then, iterate over the words, getting, for each one of those, its length, using [**`strlen()`**][3] ; and putting those lengths into an array :

$results = array();
foreach ($words as $word) {
    $length = strlen($word);
    if (isset($results[$length])) {
        $results[$length]++;
    }
    else {
        $results[$length] = 1;
    }
    
}

如果您正在工作对于 UTF-8，请参阅 mb_strlen().

At the end of that loop, `$results` would look like this :

array
  4 => int 5
  2 => int 2
  7 => int 1
  5 => int 1

The total number of words, which you'll need to calculate the percentage, can be found either :

• 通过增加 foreach 循环内的计数器，
• 或通过调用 array_sum( ) 在循环完成后的 $results 上。

对于百分比的计算，这是一些数学知识——我不会那么有帮助，关于这个^^

Answer 2

您可以按空格分解文本，然后对于每个结果单词，计算字母数。如果存在标点符号或任何其他单词分隔符，则必须考虑到这一点。

$lettercount = array();
$text = "lorem ipsum dolor sit amet";
foreach (explode(' ', $text) as $word)
{
  @$lettercount[strlen($word)]++; // @ for avoiding E_NOTICE on first addition
}

foreach ($lettercount as $numletters => $numwords)
{
  echo "$numletters letters: $numwords<br />\n";
}

ps：我还没有证明这一点，但应该可以

Answer 3

使用 preg_replace 可以更聪明地删除标点符号。

$txt = "Sean Hoare, who was first named News of the World journalist to make hacking allegations, found dead at Watford home. His death is not being treated as suspiciou";

$txt = str_replace( "  ", " ", $txt );
$txt = str_replace( ".", "", $txt );
$txt = str_replace( ",", "", $txt );

$a = explode( " ", $txt );

$cnt = array();
foreach ( $a as $b )
{
  if ( isset( $cnt[strlen($b)] ) )
    $cnt[strlen($b)] += 1;
  else
    $cnt[strlen($b)] = 1;
}

foreach ( $cnt as $k => $v )
{
  echo $k . " letter words: " . $v . " " . round( ( $v * 100 ) / count( $a ) ) . "%\n";
}

Answer 4

My simple way to limit the number of words characters in some string with php.


function checkWord_len($string, $nr_limit) {
$text_words = explode(" ", $string);
$text_count = count($text_words);
for ($i=0; $i < $text_count; $i++){ //Get the array words from text
// echo $text_words[$i] ; "
//Get the array words from text
$cc = (strlen($text_words[$i])) ;//Get the lenght char of each words from array
if($cc > $nr_limit) //Check the limit
{
$d = "0" ;
}
}
return $d ; //Return the value or null
}

$string_to_check = " heare is your text to check"; //Text to check
$nr_string_limit = '5' ; //Value of limit len word
$rez_fin = checkWord_len($string_to_check,$nr_string_limit) ;

if($rez_fin =='0')
{
echo "false";
//Execute the false code
}
elseif($rez_fin == null)
{
echo "true";
//Execute the true code
}

?>