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Remove command for php?
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Remove command for php?Posted:
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Just looking on how to remove part of a variable;
Let's say $url = HAM_SANDWICH
& I want to remove _SANDWICH
how would I go about this?
Thanks.
echo $url
Let's say $url = HAM_SANDWICH
& I want to remove _SANDWICH
how would I go about this?
Thanks.
#2. Posted:
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I don't know surely if this works, but this should for what you want..
I only have basic PHP knowledge, never really liked it
/* the function */
function remove_querystring_var($url, $key) {
$url = preg_replace('/(.*)(?|&)' . $key . '=[^&]+?(&)(.*)/i', '$1$2$4', $url . '&');
$url = substr($url, 0, -1);
return $url;
}
/* usage */
//pretending this page is I only have basic PHP knowledge, never really liked it
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#3. Posted:
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Easy:
Don't use preg_replace if you aren't doing regular expressions, it will only slow down your script!
To learn about the str_replace function go here:
[ Register or Signin to view external links. ]
$url = HAM_SANDWICH
$new_url = str_replace('_SANDWICH', '', $url);
echo $new_url;
Don't use preg_replace if you aren't doing regular expressions, it will only slow down your script!
To learn about the str_replace function go here:
[ Register or Signin to view external links. ]
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To me it is not really clear what you want to be removed exactly.
I know what you want to be removed now, but can the variable change?
- Is it just "_SANDWICH" in any URL?
- Is it anything after an underscore in a URL? (then HAM_CHEESE would also become just HAM)
Depending on which you could use the [ Register or Signin to view external links. ] function or perform a regular expression with [ Register or Signin to view external links. ] .
It's a bit slower than str_replace, but for simple scripts it honestly doesn't matter, or is noticeable for that matter. I understand it becomes "an issue" with large websites that use it a lot.
Not to mention str_replace only gets you so far, preg_replace is capable of doing much more, so which one you need depends on the situation.
I know what you want to be removed now, but can the variable change?
- Is it just "_SANDWICH" in any URL?
- Is it anything after an underscore in a URL? (then HAM_CHEESE would also become just HAM)
Depending on which you could use the [ Register or Signin to view external links. ] function or perform a regular expression with [ Register or Signin to view external links. ] .
ssshenkie wrote Don't use preg_replace if you aren't doing regular expressions, it will only slow down your script!
It's a bit slower than str_replace, but for simple scripts it honestly doesn't matter, or is noticeable for that matter. I understand it becomes "an issue" with large websites that use it a lot.
Not to mention str_replace only gets you so far, preg_replace is capable of doing much more, so which one you need depends on the situation.
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#5. Posted:
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You could also use the "split" method if you want to keep what you'r removing for later use.
it would go something like:
That's one way you could do it, but it could get tricky if there are more than one of the symbols or patterns you use to split it by in the actual string.
it would go something like:
<?php//split example
$url = "HAM_SANDWICH";
$url_array = split("_", $url);//split the string up into an array
$url = $url_array[0];//just keep the first part
echo $url;//And now it will just say "HAM"
?>
That's one way you could do it, but it could get tricky if there are more than one of the symbols or patterns you use to split it by in the actual string.
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str_replace("_SANDWICH", "", $url);
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