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	1. Captcha Numbers V2.1		string

Supplied by: Albert Demeter <e-mail contact>

Generate CAPTCHA validation images

This class can generate images for use in CAPTCHA based validation tests (Completely Automated Public Turing test to tell Computers from Humans Apart). It is an improved version of the Captcha Numbers class originally written by Hadar Porat.

This version can generate a random text string that includes letters and digits.

It can also display each of text characters in different vertical positions randomly defined.

The colors of the grid and the text characters alternate to make it more difficult for robots to guess what is the text written in the image.

New features as of 2006 March 7th:
- random pixel display (by default set to 10% of the pixels of the entire
image); if random selected pixel has background color then a random color is
selected for the random pixel, otherwise a close match of the letter's or
grid's color is generated
- removed grid display by default (it's better readable without the grid,
but it can be added, my suggestion is to add more dots instead of the grid)
- random grid color support
- added random display angle support
- added random font support
- added random font size support
- added random font color support

Improvements:
- replaced rand function calls with mt_rand (mt_rand suppose to be better
and faster, if I remember correctly)

Next to the class PHP file create a folder fonts and place TTF in order to use the random fonts feature.

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Good (85.0%)`	`Good (90.0%)`	`Sufficient (77.5%)`	`Good (87.5%)`	`-`	`-`	`Sufficient (68.0%)`	282
Month:	Not yet rated by the users

	2. E-mail address validation class		string

Supplied by: Manuel Lemos <e-mail contact>

Determine if a given e-mail address is valid.

Class that may be used to determine if a given e-mail address is valid.

It features:

- Simple validation just by looking at the e-mail address string.
- Validation of a e-mail address host as a valid mail exchange domain.
- Validation of a e-mail address by connecting to the mail host server to determine if there is really a deliverable mail box.
- Works under Windows or other platforms that do not have the GetMXRR function enabled, using Moriyoshi Koizumi DNS resolver class.

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Good (89.8%)`	`Good (82.6%)`	`-`	`Good (80.5%)`	`-`	`-`	`Sufficient (61.2%)`	726
Month:	Not yet rated by the users

	3. String Similarity		string

Supplied by: Marius Ciotlos <e-mail contact>

Calculate the similarity of two text strings

This class can be used to calculate the similarity of two text strings.

It is a PHP port of the fuzzy string comparison algorithm used in GNU diff also ported to Perl by Marc Lehmann.

The class calculates the similarity index between two strings. A value of 0 means that the strings are entirely different. A value of 1 means that the strings are identical. Other values mean that the strings are different but appear to have a degree of similarity.

Optionally it can limit the level of similarity between the strings that must be satisfied before it stops analyzing the strings. The algorithm stops when the similarity level drops below the specified limit.

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Good (91.7%)`	`Sufficient (62.5%)`	`-`	`Good (87.5%)`	`-`	`-`	`Sufficient (60.8%)`	749
Month:	Not yet rated by the users

	4. Cut HTML string		string

Supplied by: prajwala <e-mail contact>

Cut an HTML excerpt with a given text limit

This class can be used to cut an HTML excerpt with a given text limit.

It takes a string with an HTML excerpt and return the initial text and tags so the text does not exceed a given limit.

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Sufficient (75.0%)`	`Sufficient (75.0%)`	`-`	`-`	`-`	`-`	`Not sure (45.0%)`	1773
Month:	Not yet rated by the users

	5. Encrypt and Decrypt any string		string

Supplied by: Heriberto Mantilla Santamaría <e-mail contact>

Encode and decode text strings with random keys

This class can be used to encode and decode text strings using basic PHP functions.

It generates a random encoding key that is used to scramble the input text. The resulting scrambled text is mixed with the encoding key.

The decoding process recovers the encoding key from the input text and applies the inverse of the encoding process.

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Sufficient (64.3%)`	`Sufficient (67.9%)`	`-`	`Not sure (46.4%)`	`-`	`-`	`Not sure (43.6%)`	1843
Month:	Not yet rated by the users

	6. Grep Simulator		string

Supplied by: Er. Rochak Chauhan <e-mail contact>

Search for text in files like the Unix grep tool

This class can be used to search for text within files like the Unix grep utility.

The class can traverse a directory recursively and read files with given file name extensions to find the text to be searched.

It may also return the number of times that the search text string was found in a file.

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Insufficient (37.5%)`	`Not sure (43.8%)`	`-`	`Not sure (56.2%)`	`-`	`-`	`Insufficient (28.8%)`	2186
Month:	Not yet rated by the users

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