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smiliar_text() function in PHP

Posted on 2014-01-13
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Last Modified: 2014-01-13
I have a question regarding similar_text() function in php.

Is there a way so that if there are two strings with the same words but in different order to return 100%?

For example:
similar_text("George Michael", "Michael George", $percent1); //Returns 50
similar_text("George Michael", "George Michael", $percent2); //Returns 100

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Thanks a lot!
John
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Question by:infodigger
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Expert Comment

by:Ray Paseur
ID: 39776222
Sure. Make an array from the words and sort the array.
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Accepted Solution

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Ray Paseur earned 500 total points
ID: 39776246
Here's an example.  There may be more-or-less normalization on the input strings, depending on whether you want to consider punctuation, etc.

http://www.laprbass.com/RAY_temp_infodigger.php

<?php // RAY_temp_infodigger.php
error_reporting(E_ALL);
echo '<pre>';


// SEE http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/Q_28336893.html


$str = 'Oh say can you see by the dawns early light';
$alt = 'Oh you can the see by say dawns light early';

// BREAK STRINGS APART TO MAKE ARRAYS
$str_arr = explode(' ', $str);
$alt_arr = explode(' ', $alt);

// SORT THE ARRAYS
sort($str_arr);
sort($alt_arr);

// RECOVER THE STRINGS
$str_new = implode(' ', $str_arr);
$alt_new = implode(' ', $alt_arr);

// SHOW THE ORIGINAL
echo PHP_EOL . $str;
echo PHP_EOL . $alt;
echo PHP_EOL;
similar_text($str, $alt, $pct);
echo $pct;

// SHOW THE SORTED RESULTS
echo PHP_EOL . $str_new;
echo PHP_EOL . $alt_new;
echo PHP_EOL;
similar_text($str_new, $alt_new, $pct_new);
echo $pct_new;

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Author Closing Comment

by:infodigger
ID: 39776249
Thanks Ray!

As always a very complete and useful answer:)

Kind regards,
John
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LVL 109

Expert Comment

by:Ray Paseur
ID: 39776315
Thanks, John.  Glad to help!
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