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- Thread starter vbkris
- Start date
Messy way of doing it - find the character position of the first space after "little" and the following space using the strpos() function. Then display the value of the string between the two values using substr() function. Then do the same to find the word preceeding "little" using a combination of strrpos() and substr() functions.
Can't think of an easier way, sorry!
Chris
Can't think of an easier way, sorry!
Chris
- Thread starter
- #3
Try this, seems to work fine:
Code:
<?php
$string="Mary had a little black lamb";
$findme="little";
$searchpos=strpos($string,$findme);
$searchspace=strpos($string," ",$searchpos);
$searchspace2=strpos($string," ",$searchspace+1);
$searchspace3=strrpos(substr($string,0,$searchpos-1)," ");
print substr($string,$searchspace3,$searchspace2-$searchspace3);
?>-
1
- #5
danielhozac
Programmer
Try
//Daniel
Code:
if (preg_match("/ ([^ ]+little[^ ]+) /", $string, $matches))
$result = $matches[1];//Daniel
danielhozac
Programmer
This one should work better:
//Daniel
Code:
if (preg_match("/[^ ]+ little [^ ]+/", $string, $matches))
$result = $matches[0];//Daniel
-
2
- #7
sleipnir214
Programmer
danielhozac:
You beat me to the punch. I was just about to post:
Want the best answers? Ask the best questions: TANSTAAFL!!
You beat me to the punch. I was just about to post:
Code:
<?php
$mary = "Mary had a little black lamb";
preg_match ('/\w+ little \w+/', $mary, $results);
print $results[0];
?>Want the best answers? Ask the best questions: TANSTAAFL!!
- Thread starter
- #8
- Thread starter
- #10
o.k fellas, that bit of code worked gr8. sorry for the late reply, but i could get to this only now.
but then i have some more problems:
1. How do i make it case insensitive?
2. I want 5 words before and after. and if there are no words before and after the search string then only that word must be displayed.
hope u understand my problem.
i am writing a script like a search engine (very amaeturish, no databases, as of now just reading the files and check for occurences.)
Known is handfull, Unknown is worldfull
but then i have some more problems:
1. How do i make it case insensitive?
2. I want 5 words before and after. and if there are no words before and after the search string then only that word must be displayed.
hope u understand my problem.
i am writing a script like a search engine (very amaeturish, no databases, as of now just reading the files and check for occurences.)
Known is handfull, Unknown is worldfull
- Thread starter
- #11
- Thread starter
- #12
- Thread starter
- #13
danielhozac
Programmer
Try
//Daniel
Code:
if (preg_match("/(\w+ ){0,5}$term( \w+){0,5}/i", $string, $matches))
echo $matches[0];//Daniel
- Thread starter
- #15
danielhozac
Programmer
Code:
(\w+ )
Code:
{0,5}//Daniel
sleipnir214
Programmer
<sarcasm>
It's a regular expression. By definition, it works because it's voodoo.
</sarcasm>
/(\w+ ){0,5}$term( \w+){0,5}/i
"\w+" is basically a word. One or more word characters (any letter or digit or the underscore character).
"(\w+ )" is a word plus its following space.
"( \w+)" is a word plus its preceding space (or more correctly a space and its following word).
"{0,5}" means find at least zero and at most 5 of the preceding expression, which is "(\w+ )", or a word with its following space.
In English, one possible way of describing what the expression is looking for:
Look for as few as zero and as many as 5 examples in a rows of a word, each followed by a space, then look for whatever is in term, then look for as few as zero and as many as 5 examples in a row of spaces each followed by words.
Want the best answers? Ask the best questions: TANSTAAFL!!
It's a regular expression. By definition, it works because it's voodoo.
</sarcasm>
/(\w+ ){0,5}$term( \w+){0,5}/i
"\w+" is basically a word. One or more word characters (any letter or digit or the underscore character).
"(\w+ )" is a word plus its following space.
"( \w+)" is a word plus its preceding space (or more correctly a space and its following word).
"{0,5}" means find at least zero and at most 5 of the preceding expression, which is "(\w+ )", or a word with its following space.
In English, one possible way of describing what the expression is looking for:
Look for as few as zero and as many as 5 examples in a rows of a word, each followed by a space, then look for whatever is in term, then look for as few as zero and as many as 5 examples in a row of spaces each followed by words.
Want the best answers? Ask the best questions: TANSTAAFL!!
- Thread starter
- #18
sleipnir214
Programmer
I dunno. I learned them when I had a perl project dumped in my lap once. I didn't know perl at the time.
Since danielhozac and I are both talking about perl-compatible regular expressions, you might widen your search to include tutorials on the use of regular expressions in perl.
Zend has a tutorial:
Want the best answers? Ask the best questions: TANSTAAFL!!
Since danielhozac and I are both talking about perl-compatible regular expressions, you might widen your search to include tutorials on the use of regular expressions in perl.
Zend has a tutorial:
Want the best answers? Ask the best questions: TANSTAAFL!!
- Thread starter
- #20
- Status