4.1.7

• Fix AbstractHtml::expandTabs() $tabSize undeclared.
• Fix problem caused by in OP_EQ, it still may be $old !== $new.
• Update example/old_file.txt and the new one.

4.1.5

The following APIs have been deprecated and will be removed in v5.

• Diff::setA() becomes Diff::setOld().
• Diff::setB() becomes Diff::setNew().
• Diff::setAB() becomes Diff::setOldNew().
• Diff::getA() becomes Diff::getOld().
• Diff::getB() becomes Diff::getNew().

4.1.4

• Fix potential boundary error in Diff::getText().
  Both $start and $end could be negative.

4.1.3

• Fix Diff::getText() when $end is null.

4.1.2

• Update jfcherng/php-sequence-matcher ^2.0

Release of new version 4.1.1

• Fix HTML renderer should not emphasize inserted/deleted lines.

  It looks like the following screenshot now. Line 3 (new) and 11 (old) are no longer wholly emphasized.
  

• Fix HTML special chars in JSON renderer should be escaped.

4.1.0

• Allow HTML renderer option tabSize to be < 0, which means do not convert tab into spaces. In this case, you must add your own CSS to visualize tabs in HTML.

4.0.1

• Move factory classes to Jfcherng\Diff\Factory\
• Merge ReservedConstantInterface into RendererConstant

4.0.0

• Add final keyword to non-inherited classes.
• Strip out SequenceMatcher as an external package.

See https://github.com/jfcherng/php-diff/blob/v4/UPGRADING_v4.md for upgrading.

3.3.0

• Use JSON format language files.

  Doing something like require "{$language}.php" is potentially dangerous if the languages/ folder is written with some malicious PHP scripts.