Question

如何在前100个字符后添加<br />？我的意思是只打破一次，而不是在每100个字符后添加<br />。

$str="Apple has announced that co-founder, former CEO and chairman of the board Steve Jobs has passed away at the age of 56, so we take a look back at the famous innovator's life.At left, Steve Jobs, chairman of the board of Apple Computer, leans on the new 'Macintosh' personal computer following a shareholder's meeting Jan. 24, 1984, in Cupertino, Calif. The Macintosh was priced at $2,495.";
//echo substr($str, 0, 100).'<br />'; this will break sentence after 100 characters. 
//echo wordwrap($str, 100, "\n<br />\n");this will add <br /> after each 100 characters.

我需要的是：

Apple has announced that co-founder, former CEO and chairman of the board Steve Jobs has passed away    
<br /> <-- only add here.
at the age of 56, so we take a look back at the famous innovator's life.At left, Steve Jobs, chairman of the board of Apple Computer, leans on the new 'Macintosh' personal computer following a shareholder's meeting Jan. 24, 1984, in Cupertino, Calif. The Macintosh was priced at $2,495.

Answer 1

如果你打算写“在字母之后分手”，而不是字符，那么substr就不会这样做。并且wordwrap确实可以正常工作。所以你需要手动找到100个字母并在那里注入一个休息点：

$str = preg_replace('/^.{100,}?\b/s', "$0<br>", $str);

Answer 2

PHP具有在特定位置将字符串插入另一个字符串的功能，它被称为substr_replace：

echo substr_replace($str, '<br>', 100, 0);

如果你需要支持UTF-8（你没有指定任何编码），你可以使用正则表达式和preg_replace来执行此操作，这样也不会删除单词：

echo preg_replace('/^.{80,120}+\b/su', '$0<br>', $str);

Answer 3

您可以使用substr获取前100个字符并添加<br />然后获取所有其他字符。例如：

<?php
    echo substr( $string , 0, 100)
         , "<br />"
         , substr( $string, 100 );
?>

Answer 4

$str="Apple has announced that co-founder, former CEO and chairman of the board Steve Jobs has passed away at the age of 56, so we take a look back at the famous innovator's life.At left, Steve Jobs, chairman of the board of Apple Computer, leans on the new 'Macintosh' personal computer following a shareholder's meeting Jan. 24, 1984, in Cupertino, Calif. The Macintosh was priced at $2,495.";
$first_part = substr ( $str ,0,100);
$second_part = substr ( $str ,100); //Goes to end of str
$new = $first_part."<br />".$second_part;

Answer 5

我会做这样的事情

<?
    $str="Apple has announced that co-founder, former CEO and chairman of the board Steve Jobs has passed away at the age of 56, so we take a look back at the famous innovator's life.At left, Steve Jobs, chairman of the board of Apple Computer, leans on the new 'Macintosh' personal computer following a shareholder's meeting Jan. 24, 1984, in Cupertino, Calif. The Macintosh was priced at $2,495.";

    for ($i = 0; $i < strlen($str); $i += 99)
    {
        if ((strlen($str) - $i) < 100) {
            echo substr($str, $i, strlen($str));
        } else {
            echo substr($str, $i, 100);
        }

        echo "<br />";
    }
?>

Answer 6

这可行：

$text = "...";
if (isset($text[100])) {
    $text[100] = $text[100] . "<br />";
}

php只在前100个字符后添加<br/>

6 个答案: