PHP:在文本文件中每个$num单词后插入换行符 - PHP: Insert line break after every $num word in a text file

我想清理一个.txt文件，通过在每四个单词之后插入一个换行符，使其更具可读性。文件已被数组中的数据填充。

这是我目前为止通过观察这个和这个得出的结论:

<?php
require "simple_html_dom.php";
$html = file_get_html("http://www.lipsum.com/");
$data = array();
$counter = 0;

foreach($html->find("div") as $tr){
    $row = array();
    foreach($tr->find("div") as $td){
        $row[] = $td->plaintext;
    }
     $data[] = $row;
    }

ob_start();
var_dump($data);
$data = preg_replace('~(('w+'s){4})~', '$1' . "'n", $data);
file_put_contents('new_text_file.txt', $data);

//$handlefile = fopen("newfile.txt", "w") or die("Unable to open file!");
//file_put_contents('newfile.txt', $data);
//$output = ob_get_clean();
//$outputFile = "newfile.txt";

//fwrite($handlefile, $output);
//fclose($handlefile);

?>

正如您所看到的，我创建了一个for循环和两个if语句来"计数"单词之间的间距，当counter变量达到3时，插入一个换行符。但它不起作用，因为网站上的数据没有被打印到文本文件中。但是，如果我去掉for循环和if语句，当然不需要排序，它就能工作。任何类型的帮助都是值得赞赏的!

编辑:更新后的代码。

编辑2:最终工作版本。原问题留作参考

这是最终工作版本:

<?php
require "simple_html_dom.php";
$html = file_get_html("http://www.lipsum.com/");
$data = array();
$counter = 0;

foreach($html->find("div") as $tr){
    $row = array();
    foreach($tr->find("div") as $td){
        $row[] = $td->plaintext;
    }
     $data[] = $row;
    }

ob_start();
var_dump($data);
$handlefile = fopen("newfile.txt", "w") or die("Unable to open file!");
file_put_contents('newfile.txt', $data);
$output = ob_get_clean();
$outputFile = "newfile.txt";
fwrite($handlefile, $output);
fclose($handlefile);
function MakeFileReadable($source , $export) {
    $content = file_get_contents($source);
    $x = explode (" " , $content);
    $newx = "";
    $count = 1;
    foreach ($x as $word) {
        $newx .= $word . " ";
        if ($count %12 ==0) $newx .= "'r'n";
        $count ++;
    }
    $fp = fopen("file-export.txt" , 'w');
    if (!$fp) die("There is a problem with opening file...");
    fwrite($fp , $newx);
    fclose($fp);
}
MakeFileReadable("newfile.txt" , "file-export.txt");
?>

使用一些数组函数

$string = "one two three four five six seven eight nine ten eleven tweleve thirteen fourteen";
$arr = explode (" " , $string);
$lines = array_chunk($arr,4);
foreach($lines as $line) 
   echo implode (" ", $line)."'r'n";

结果

one two three four
five six seven eight
nine ten eleven tweleve
thirteen fourteen

这是一个正则表达式的解决方案。

<?php
$test = 'one two three four five six seven eight nine ten eleven tweleve thirteen fourteen';
echo preg_replace('~(('w+'s){4})~', '$1' . "'n", $test);

输出:

one two three four 
five six seven eight 
nine ten eleven tweleve

'w是一个单词字符(字母数字字符加上"_"，http://en.wikipedia.org/wiki/Regular_expression)，如果您只想要A-Z，则使用[a-z]并使用i修饰符使其不区分大小写，~(('w+'s){4})~i。's是一个空格，{4}需要出现4次'w+'s。

根据你的代码…

$data = preg_replace('~(('w+'s){4})~', '$1' . "'n", $data);
file_put_contents('new_text_file.txt', $data);

http://php.net/manual/en/function.file-put-contents.php

每个更新的代码:

<?php
require "simple_html_dom.php";
$html = file_get_html("http://www.lipsum.com/");
$data = array();
$counter = 0;
foreach($html->find("div") as $tr){
    $row = array();
    foreach($tr->find("div") as $td){
        $row[] = $td->plaintext;
    }
    $data[] = $row;
}
$data = preg_replace('~(('w+'s){4})~', '$1' . "'n", implode(' ', $data));
file_put_contents('new_text_file.txt', $data, FILE_APPEND | LOCK_EX);

最终测试代码:

    <?php
function MakeFileReadable($source , $export) {
    $content = file_get_contents($source);
    $x = explode (" " , $content);
    sort($x);
    $newx = "";
    $count = 1;
    foreach ($x as $word) {
        $newx .= $word . " ";
        if ($count %4 ==0) $newx .= "'r'n";
        $count ++;
    }
    $fp = fopen($export , 'w');
    if (!$fp) die("There is a problem with opening file...");
    fwrite($fp , $newx);
    fclose($fp);
}
MakeFileReadable("file-input.txt" , "file-export.txt");