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# xdiff_string_diff

(PECL)

xdiff_string_diff -- Make unified diff of two strings

## Description

string xdiff_string_diff ( string str1, string str2 [, int context [, bool minimal]] )

xdiff_string_diff() makes unified diff of strings str1 and str2. context indicated how many lines of context you want to include in diff result. Set minimal to `TRUE` if you want to minimalize size of diff (can take a long time).

> Note: This function doesn't work well with binary strings. To make diff of binary strings use xdiff_string_diff_binary().

Returns string with result or `FALSE` if an internal error happened.

Example 1. xdiff_string_diff() example

The following code makes unified diff of two articles.

`<?php $old_article = file_get_contents('./old_article.txt'); $new_article = $_REQUEST['article']; /* Let's say that someone pasted a new article to html form */ $diff = xdiff_string_diff($old_article, $new_article, 1); if (is_string($diff)) { echo "Differences between two articles:\n"; echo $diff; } ?>`

See also xdiff_file_diff().

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xdiff_string_diff_binary | Up | xdiff_string_merge3