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Replacing the First Ocurance of a String

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Feb 15.2006

hi,
i want to replace only the first occurance of a String (as u know str_replace() replaces all the occurances of a string)

i want only the first one to be replaced
can u help me???
-ashish

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PHP

5 Comments(s) ↴

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@pyroFeb 15.2006 — You could do it like this:

[code=php]<?PHP
$str = 'This is a test. This is also a test.';
$str = preg_replace('/^(.*?)test/i', '$1foo', $str);
echo $str;
?>[/code]
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@ashishrathoreauthorFeb 15.2006 — thanks boss

its working

-ashish
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@ashishrathoreauthorFeb 15.2006 — hey i got into new problem.

this regular expression works well with a string with many words in that

but what i want is a string is there like

"[B]cat2[/B];[email protected];sub[B]cat2[/B]1;#;"

now i want to replace the first one "cat2" and not the other one(the second one in"subcat21")

have got any ideas???

-ashish
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@NogDogFeb 15.2006 — [code=php]
$string = preg_replace('/cat2/', 'foobar', $string, 1); // 4th param limits number of replacements
[/code]
Or, if the string is always formatted that way:
[code=php]
$parts = explode(";", $string);
if($parts[0] == "cat2")
{
$parts[0] == "foobar";
$string = implode(";", $parts);
}
[/code]
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@ashishrathoreauthorFeb 15.2006 — thanks boss again

its working

-ashish
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