Extract a number of words from text

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CoursesWeb

Post subject: Extract a number of words from text

Posted: Mon Dec 09, 2013 12:10 pm

Forum Newbie

Joined: Mon Dec 09, 2013 11:52 am
Posts: 18

Hi
This is m 1st post on this forum, and i want to begin with something useful to contribute.
Here is a small php code that can be used to extract a number of words from text.

Code:

$text = 'Extract the text with first 45 characters from this string.';
$nrw = 10;                         // the number of words we want to extract

$rgxwords = '/([^ ]*[ ]{0,1}){1,'.$nrw.'}/i';            // patern to get a number of words from string
$text = preg_replace('/\s\s+/', ' ', $text);             // replace multiple whitespaces whith single space
$text = trim($text);                                     // to remove whitespace from the beginning and ending

// get the substring
if(preg_match($rgxwords, $text, $mtc)) $txt = $mtc[0];
else $txt = '';

echo $txt;
 

Last edited by requinix on Mon Dec 09, 2013 1:54 pm, edited 1 time in total.

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Weirdan

Post subject: Re: Extract a number of words from text

Posted: Mon Dec 09, 2013 6:16 pm

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Joined: Mon Nov 03, 2003 7:13 pm
Posts: 5975
Location: Odessa, Ukraine

Syntax: [ Download ] [ Hide ]

$text = 'Extract the text with first 45 characters from this string.';

$nrw = 6;

echo join(" ", array_slice(str_word_count($text, 1, '0..9'), 0, $nrw));

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CoursesWeb

Post subject: Re: Extract a number of words from text

Posted: Tue Dec 10, 2013 1:47 am

Forum Newbie

Joined: Mon Dec 09, 2013 11:52 am
Posts: 18

But if you have comma, dot or other punctuations in text, using array_slice() will lose the punctuations.

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Weirdan

Post subject: Re: Extract a number of words from text

Posted: Tue Dec 10, 2013 1:56 am

Moderator

Joined: Mon Nov 03, 2003 7:13 pm
Posts: 5975
Location: Odessa, Ukraine

It depends on what is actually needed. As the title goes, punctuation does not belong to 'words'

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CoursesWeb

Post subject: Re: Extract a number of words from text

Posted: Wed Dec 11, 2013 4:10 am

Forum Newbie

Joined: Mon Dec 09, 2013 11:52 am
Posts: 18

Yes, You are right. I wrote that code to get the "n" first words from a text, that to add a Read more ..
In this usage is needed to keep the punctuations, and also not break words.

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