Php 计算多个文件中的词频

将您得到的内容放入函数中，并使用循环为数组中的每个文件名调用该函数：

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您是否尝试过为每个文件将整个内容包装成一个循环？
<?php



$filename = "largefile.txt";



/* get content of $filename in $content */

$content = strtolower(file_get_contents($filename));



/* split $content into array of substrings of $content i.e wordwise */

$wordArray = preg_split('/[^a-z]/', $content, -1, PREG_SPLIT_NO_EMPTY);



/* "stop words", filter them */

$filteredArray = array_filter($wordArray, function($x){

return !preg_match("/^(.|a|an|and|the|this|at|in|or|of|is|for|to)$/",$x);

});



/* get associative array of values from $filteredArray as keys and their frequency count as value */

$wordFrequencyArray = array_count_values($filteredArray);



/* Sort array from higher to lower, keeping keys */

arsort($wordFrequencyArray);

<?php

$wordFrequencyArray = array();

function countWords($file) use($wordFrequencyArray) {
    /* get content of $filename in $content */
    $content = strtolower(file_get_contents($filename));

    /* split $content into array of substrings of $content i.e wordwise */
    $wordArray = preg_split('/[^a-z]/', $content, -1, PREG_SPLIT_NO_EMPTY);

    /* "stop words", filter them */
    $filteredArray = array_filter($wordArray, function($x){
        return !preg_match("/^(.|a|an|and|the|this|at|in|or|of|is|for|to)$/",$x);
    });

    /* get associative array of values from $filteredArray as keys and their frequency count as value */
    foreach (array_count_values($filteredArray) as $word => $count) {
        if (!isset($wordFrequencyArray[$word])) $wordFrequencyArray[$word] = 0;
        $wordFrequencyArray[$word] += $count;
    }
}
$filenames = array('file1.txt', 'file2.txt', 'file3.txt', 'file4.txt' ...);
foreach ($filenames as $file) {
    countWords($file);
}

print_r($wordFrequencyArray);