1 | <?php |
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2 | |||||
3 | /** |
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4 | * JavaScript-like HTML DOM Element. |
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5 | * |
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6 | * This class extends PHP's DOMElement to allow |
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7 | * users to get and set the innerHTML property of |
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8 | * HTML elements in the same way it's done in |
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9 | * JavaScript. |
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10 | * |
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11 | * Example usage: |
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12 | * |
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13 | * ```php |
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14 | * require_once 'JSLikeHTMLElement.php'; |
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15 | * header('Content-Type: text/plain'); |
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16 | * $doc = new DOMDocument(); |
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17 | * $doc->registerNodeClass('DOMElement', 'JSLikeHTMLElement'); |
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18 | * $doc->loadHTML('<div><p>Para 1</p><p>Para 2</p></div>'); |
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19 | * $elem = $doc->getElementsByTagName('div')->item(0); |
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20 | * |
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21 | * // print innerHTML |
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22 | * echo $elem->innerHTML; // prints '<p>Para 1</p><p>Para 2</p>' |
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23 | * echo "\n\n"; |
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24 | * |
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25 | * // set innerHTML |
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26 | * $elem->innerHTML = '<a href="http://fivefilters.org">FiveFilters.org</a>'; |
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27 | * echo $elem->innerHTML; // prints '<a href="http://fivefilters.org">FiveFilters.org</a>' |
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28 | * echo "\n\n"; |
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29 | * |
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30 | * // print document (with our changes) |
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31 | * echo $doc->saveXML(); |
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32 | * ``` |
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33 | * |
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34 | * @author Keyvan Minoukadeh - http://www.keyvan.net - [email protected] |
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35 | * |
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36 | * @see http://fivefilters.org (the project this was written for) |
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37 | */ |
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38 | class JSLikeHTMLElement extends DOMElement |
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39 | { |
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40 | /** |
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41 | * Used for setting innerHTML like it's done in JavaScript:. |
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42 | * |
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43 | * @code |
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44 | * $div->innerHTML = '<h2>Chapter 2</h2><p>The story begins...</p>'; |
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45 | * @endcode |
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46 | */ |
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47 | public function __set($name, $value) |
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48 | { |
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49 | if ('innerHTML' == $name) { |
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50 | // first, empty the element |
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51 | for ($x = $this->childNodes->length - 1; $x >= 0; --$x) { |
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52 | $this->removeChild($this->childNodes->item($x)); |
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53 | } |
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54 | // $value holds our new inner HTML |
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55 | if ('' != $value) { |
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56 | $f = $this->ownerDocument->createDocumentFragment(); |
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57 | // appendXML() expects well-formed markup (XHTML) |
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58 | $result = @$f->appendXML($value); // @ to suppress PHP warnings |
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59 | if ($result) { |
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60 | if ($f->hasChildNodes()) { |
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61 | $this->appendChild($f); |
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62 | } |
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63 | } else { |
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64 | // $value is probably ill-formed |
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65 | $f = new DOMDocument(); |
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66 | $value = mb_convert_encoding($value, 'HTML-ENTITIES', 'UTF-8'); |
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67 | // Using <htmlfragment> will generate a warning, but so will bad HTML |
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68 | // (and by this point, bad HTML is what we've got). |
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69 | // We use it (and suppress the warning) because an HTML fragment will |
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70 | // be wrapped around <html><body> tags which we don't really want to keep. |
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71 | // Note: despite the warning, if loadHTML succeeds it will return true. |
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72 | $result = @$f->loadHTML('<htmlfragment>' . $value . '</htmlfragment>'); |
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$value of type array|string can be used in concatenation ?
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73 | if ($result) { |
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74 | $import = $f->getElementsByTagName('htmlfragment')->item(0); |
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75 | foreach ($import->childNodes as $child) { |
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76 | $importedNode = $this->ownerDocument->importNode($child, true); |
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77 | $this->appendChild($importedNode); |
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78 | } |
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79 | } else { |
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80 | // oh well, we tried, we really did. :( |
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81 | // this element is now empty |
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82 | } |
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83 | } |
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84 | } |
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85 | } else { |
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86 | $trace = debug_backtrace(); |
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87 | trigger_error('Undefined property via __set(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'], E_USER_NOTICE); |
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88 | } |
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89 | } |
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90 | |||||
91 | /** |
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92 | * Used for getting innerHTML like it's done in JavaScript:. |
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93 | * |
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94 | * @code |
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95 | * $string = $div->innerHTML; |
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96 | * @endcode |
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97 | */ |
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98 | public function __get($name) |
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99 | { |
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100 | if ('innerHTML' == $name) { |
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101 | $inner = ''; |
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102 | foreach ($this->childNodes as $child) { |
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103 | $inner .= $this->ownerDocument->saveXML($child); |
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104 | } |
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105 | |||||
106 | return $inner; |
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107 | } |
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108 | |||||
109 | $trace = debug_backtrace(); |
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110 | trigger_error('Undefined property via __get(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'], E_USER_NOTICE); |
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111 | |||||
112 | return null; |
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113 | } |
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114 | |||||
115 | public function __toString() |
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116 | { |
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117 | return '[' . $this->tagName . ']'; |
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118 | } |
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119 | } |
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120 |
This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces.
This is most likely a typographical error or the method has been renamed.