以双连字符开头的每行的正则表达式

Question

我有一个字符串，我想从中匹配并分隔以双连字符开头的每一行，并用h4元素替换这些字符串，而不使用与双连字符匹配的字符。

这是我的代码。

$rcp_ingredients = '--For Salad 
    1 1/2 Cup warm water (105°F-115°F)
    2 1/4 Teaspoon active dry yeast
    --For glaze 
    1 cup packed dark brown sugar
    2 tablespoons finely chopped garlic
    1 tablespoon Tabasco
    --For Marination
    3 tablespoons fresh lime juice
    1 tablespoon fresh orange juice
    1 tablespoon Dijon mustard
    1 teaspoon curry powder, toasted
    1/2 teaspoon salt
    1/4 teaspoon black pepper
    1/2 cup olive oil ';

$list = explode("\n", $rcp_ingredients);

foreach ( $list as $key => $data ) {
    $data = preg_replace( '/\-{2}(\w+)/' , '<h4>$1</h4>', $data );
    $pos = strpos( $data, '<h4>' );
    if ( $pos === false ) {
        echo '<span class="name">' . $data . '</span>';
    } else {
        echo $data;
    }
}

输出

<h4>For</h4> Salad 
<span class="name">1 1/2 Cup warm water (105°F-115°F)
</span><span class="name">2 1/4 Teaspoon active dry yeast
</span><h4>For</h4> glaze 
<span class="name">1 cup packed dark brown sugar
</span><span class="name">2 tablespoons finely chopped garlic
</span><span class="name">1 tablespoon Tabasco
</span><h4>For</h4> Marination
<span class="name">3 tablespoons fresh lime juice
</span><span class="name">1 tablespoon fresh orange juice
</span><span class="name">1 tablespoon Dijon mustard
</span><span class="name">1 teaspoon curry powder, toasted
</span><span class="name">1/2 teaspoon salt
</span><span class="name">1/4 teaspoon black pepper
</span><span class="name">1/2 cup olive oil </span>

我想得到的输出是。

<h4>For Salad</h4>
<span class="name">1 1/2 Cup warm water (105°F-115°F)</span>
<span class="name">2 1/4 Teaspoon active dry yeast</span>
<h4>For Glaze </h4>
<span class="name">1 cup packed dark brown sugar</span>
<span class="name">2 tablespoons finely chopped garlic</span>
<span class="name">1 tablespoon Tabasco</span>
<h4>For Marination</h4>
<span class="name">3 tablespoons fresh lime juice</span>
<span class="name">1 tablespoon fresh orange juice</span>
<span class="name">1 tablespoon Dijon mustard</span>
<span class="name">1 teaspoon curry powder, toasted</span>
<span class="name">1/2 teaspoon salt</span>
<span class="name">1/4 teaspoon black pepper</span>
<span class="name">1/2 cup olive oil </span>

Answer 1

试试这个希望这会帮助你..问题是

1. (\\w+)的字像For Salad它包含单词以及空间，如果你想抓住一切始于--你可以使用^\\s*\\-{2}(.*)

在此处尝试此代码段

<?php

ini_set('display_errors', 1);

$rcp_ingredients = '--For Salad 
    1 1/2 Cup warm water (105°F-115°F)
    2 1/4 Teaspoon active dry yeast
    --For glaze 
    1 cup packed dark brown sugar
    2 tablespoons finely chopped garlic
    1 tablespoon Tabasco
    --For Marination
    3 tablespoons fresh lime juice
    1 tablespoon fresh orange juice
    1 tablespoon Dijon mustard
    1 teaspoon curry powder, toasted
    1/2 teaspoon salt
    1/4 teaspoon black pepper
    1/2 cup olive oil ';

$list = explode("\n", $rcp_ingredients);

foreach ($list as $key => $data)
{
    $data = preg_replace('/^\s*\-{2}(.*)/', '<h4>$1</h4>', $data);
    $pos = strpos($data, '<h4>');
    if ($pos === false)
    {
        echo '<span class="name">' . $data . '</span>';
    } else
    {
        echo $data;
    }
}

Answer 2

使用(\\w+)您只匹配第一个单词（后面的-- ）。 将其更改为“任何”以捕获破折号后面的整个字符串：

$data = preg_replace( '/\-{2}(.*)/' , '<h4>$1</h4>', $data );