Различия в тексте - Работа с текстом - Интересные решения для программистов - Примеры кода

Работа с текстом → Различия в тексте → PHP

Класс - надстройка над PEAR-модулем Text Diff, позволяет определять различия в между двумя текстами. Текст, который был добавлен будет отмечен зеленым, текст, который был удален будет отмечен красным цветом.

<?php

// This line must be used to load the Text/Diff.php PEAR module
// This can be downloaded from http://pear.php.net/package/Text_Diff
require_once("somepath/Text/Diff.php");

// Object created like this:
// $diff = new diff($from_text,$to_text);
// $from_text is the original text
// $to_text is the modified text
class diff extends Text_MappedDiff {

public function diff($from_text,$to_text) {
 #public function __construct($from_text,$to_text) {
 
 // Split the text into words
 $from_words = preg_split('/\b/',$from_text);
 $to_words = preg_split('/\b/',$to_text);
 
 // These alternate split statements will split the text into individual characters
 //$from_words = str_split($from_text,1);
 //$to_words = str_split($to_text,1);
 
 // These split statements will split the text into lines
 //$from_words = explode("\n",$from_text);
 //$to_words = explode("\n",$to_text);
 
 // Text_MappedDiff requires copies of these variables
 $mapped_from_words = $from_words;
 $mapped_to_words = $to_words;
 
 // Call the construct method of the parent class
 parent::Text_MappedDiff($from_words,$to_words,$mapped_from_words,$mapped_to_words);
 }
 
 // Renders the difference
 public function render() {
 $difference = $this->getDiff(); // Calls the getDiff() method, part of Text_MappedDiff
 $render = ''; // This will be the rendered difference.
 foreach ($difference as $op) {
 // $op is the operation getDiff() has calculated.
 // You can tell which operation (add, delete or change) $op is by checking which class the object is
 if (is_a(&$op,'Text_Diff_Op_copy')) {
 #if ($op instanceof Text_Diff_Op_copy) { // This uses the instanceof operator which is only in PHP5+, in PHP4 you can use is_a()
 // Text was copied (not changed), add it to the rendered difference unmodified
 $render .= implode('',$op->final);
 } elseif (is_a(&$op,'Text_Diff_Op_delete')) {
 #} elseif ($op instanceof Text_Diff_Op_delete) {
 // Text was deleted, add it to the rendered difference in red
 $render .= '' . implode('',$op->orig) . '';
 } elseif (is_a(&$op,'Text_Diff_Op_add')) {
 #} elseif ($op instanceof Text_Diff_Op_add) {
 // Text was added, add it to the rendered difference in green
 $render .= '' . implode('',$op->final) . '';
 } elseif (is_a(&$op,'Text_Diff_Op_change')) {
 #} elseif ($op instanceof Text_Diff_Op_change) {
 // Text was modified, add it to the rendered difference as if the original text was deleted and the new text was added
 $render .= '' . implode('',$op->orig) . '' . 
 '' . implode('',$op->final) . '';
 }
 }
 
 return $render;
 }

}

class, difference, php, string, text

sivan

unknown

26.03.2008

Меню

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	Работа с текстом → Различия в тексте → PHP Класс - надстройка над PEAR-модулем Text Diff, позволяет определять различия в между двумя текстами. Текст, который был добавлен будет отмечен зеленым, текст, который был удален будет отмечен красным цветом. <?php // This line must be used to load the Text/Diff.php PEAR module // This can be downloaded from http://pear.php.net/package/Text_Diff require_once("somepath/Text/Diff.php"); // Object created like this: // $diff = new diff($from_text,$to_text); // $from_text is the original text // $to_text is the modified text class diff extends Text_MappedDiff { public function diff($from_text,$to_text) { #public function __construct($from_text,$to_text) { // Split the text into words $from_words = preg_split('/\b/',$from_text); $to_words = preg_split('/\b/',$to_text); // These alternate split statements will split the text into individual characters //$from_words = str_split($from_text,1); //$to_words = str_split($to_text,1); // These split statements will split the text into lines //$from_words = explode("\n",$from_text); //$to_words = explode("\n",$to_text); // Text_MappedDiff requires copies of these variables $mapped_from_words = $from_words; $mapped_to_words = $to_words; // Call the construct method of the parent class parent::Text_MappedDiff($from_words,$to_words,$mapped_from_words,$mapped_to_words); } // Renders the difference public function render() { $difference = $this->getDiff(); // Calls the getDiff() method, part of Text_MappedDiff $render = ''; // This will be the rendered difference. foreach ($difference as $op) { // $op is the operation getDiff() has calculated. // You can tell which operation (add, delete or change) $op is by checking which class the object is if (is_a(&$op,'Text_Diff_Op_copy')) { #if ($op instanceof Text_Diff_Op_copy) { // This uses the instanceof operator which is only in PHP5+, in PHP4 you can use is_a() // Text was copied (not changed), add it to the rendered difference unmodified $render .= implode('',$op->final); } elseif (is_a(&$op,'Text_Diff_Op_delete')) { #} elseif ($op instanceof Text_Diff_Op_delete) { // Text was deleted, add it to the rendered difference in red $render .= '<span style="background-color: #FF0000;">' . implode('',$op->orig) . '</span>'; } elseif (is_a(&$op,'Text_Diff_Op_add')) { #} elseif ($op instanceof Text_Diff_Op_add) { // Text was added, add it to the rendered difference in green $render .= '<span style="background-color: #00FF00;">' . implode('',$op->final) . '</span>'; } elseif (is_a(&$op,'Text_Diff_Op_change')) { #} elseif ($op instanceof Text_Diff_Op_change) { // Text was modified, add it to the rendered difference as if the original text was deleted and the new text was added $render .= '<span style="background-color: #FF0000;">' . implode('',$op->orig) . '</span>' . '<span style="background-color: #00FF00;">' . implode('',$op->final) . '</span>'; } } return $render; } } ?> class, difference, php, string, text sivan unknown 26.03.2008 Ваше имя Ваш E-mail (если хотите отслеживать комментарии) Дoкажи, что ты не робот Текст комментария	Меню CodeIgniter Алгоритмы Базы данных Дата и Время Интернет Интерфейс Мультимедиа ОС и Железо Работа с текстом Разное Технологии Файлы Подписка на RSS: Подпишись на RSS-ленту Поиск Облако тегов .net array asp bash browser charset check class clean convert count create css curl database date delete directory download element email equivalent extension file find form format function get height html http ie image javascript jquery load mysql number page perl php random scriplet send shell size sql string text time url utf8 variable vb visual basic width window xml xslt