Say I have
sometext-somemore--test---test2
how could I have it replace all instaces where there are more than 1 - and have it replace them with just 1 so it would look like this
sometext-somemore-test-test2
+2
A:
use a regex: s/-+/-/ The + says 'one or more of the preceding character'.
dnagirl
2010-04-12 18:13:31
A:
Brendan Long
2010-04-12 18:14:15
I don't see how the for/if loop would work.. as far as I can see, it replaces '55' with '5' if characters 4 and 5 are both 'x'. You'd want to check that $text[$i] == '-' also, and you'd have to use substr_replace($text, '-', $i, 2) instead of str_replace(). Regex is probably the way to go, though.
MSpreij
2010-04-12 18:24:33
@MSpreij: It seems Brendan was trying to create an algorithm to replace arbitrary repeating characters. @Brendan Long: Try this instead: preg_replace('{(.)\1+}', '$1', $text);
webbiedave
2010-04-12 18:35:59
Yeah when i read it, I thought the question was asking how to replace any two repeating characters :\
Brendan Long
2010-04-12 18:38:16
A:
Use this:
echo preg_replace("/-+/","-","sometext-somemore--test---test2");
//prints sometext-somemore-test-test2
zombat
2010-04-12 18:14:38
+1
A:
You could do this with a regular expression and the preg_replace function :
$str = 'sometext-somemore--test---test2';
echo preg_replace('/-+/', '-', $str);
would give you :
sometext-somemore-test-test2
The pattern I used here : -+
- Matches a
- - One or more than one time :
+- See Repetition in the PCRE manual, about this.
And don't hesitate to read the PCRE Patterns section of the manual, if you are interested by regular expressions ;-)
Pascal MARTIN
2010-04-12 18:15:08