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1 | <?php |
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2 | |||
3 | namespace League\HTMLToMarkdown\Converter; |
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4 | |||
5 | use League\HTMLToMarkdown\ElementInterface; |
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6 | |||
7 | class CodeConverter implements ConverterInterface |
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8 | { |
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9 | /** |
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10 | * @param ElementInterface $element |
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11 | * |
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12 | * @return string |
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13 | */ |
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14 | 12 | public function convert(ElementInterface $element) |
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15 | { |
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16 | 12 | $language = null; |
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17 | |||
18 | // Checking for language class on the code block |
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19 | 12 | $classes = $element->getAttribute('class'); |
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20 | |||
21 | 12 | if ($classes) { |
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22 | // Since tags can have more than one class, we need to find the one that starts with 'language-' |
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23 | 3 | $classes = explode(' ', $classes); |
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24 | 3 | foreach ($classes as $class) { |
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25 | 3 | if (strpos($class, 'language-') !== false) { |
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26 | // Found one, save it as the selected language and stop looping over the classes. |
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27 | // The space after the language avoids gluing the actual code with the language tag |
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28 | 3 | $language = str_replace('language-', '', $class) . ' '; |
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29 | 3 | break; |
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30 | } |
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31 | 2 | } |
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32 | 2 | } |
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33 | |||
34 | 12 | $markdown = ''; |
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35 | 12 | $code = html_entity_decode($element->getChildrenAsString()); |
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36 | |||
37 | // In order to remove the code tags we need to search for them and, in the case of the opening tag |
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38 | // use a regular expression to find the tag and the other attributes it might have |
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39 | 12 | $code = preg_replace('/<code\b[^>]*>/', '', $code); |
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40 | 12 | $code = str_replace('</code>', '', $code); |
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41 | |||
42 | // Checking if the code has multiple lines |
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43 | 12 | $lines = preg_split('/\r\n|\r|\n/', $code); |
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44 | 12 | if ($language || count($lines) > 1) { |
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45 | // Multiple lines detected, adding three backticks and newlines |
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46 | 3 | $markdown .= '```' . $language . "\n" . $code . "\n" . '```' . "\n\n"; |
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47 | 2 | } else { |
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48 | // One line of code, wrapping it on one backtick. |
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49 | 12 | $markdown .= '`' . $language . $code . '`'; |
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50 | } |
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51 | |||
52 | 12 | return $markdown; |
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53 | } |
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54 | |||
55 | /** |
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56 | * @return string[] |
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57 | */ |
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58 | 84 | public function getSupportedTags() |
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59 | { |
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60 | 84 | return array('code'); |
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61 | } |
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62 | } |
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63 |
In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: