This is the problem that I have in PHP and jQuery.
I want to make a "smart" function that will not only clean white space, but also a certain character at the beginning and end of the string. Why?
I made administration panel who manage with subdomains. Allowed characters is [a-z0-9-.]. If someone accidentally write "-my.domanin." or ".my-domain" or "-my-domain-" or a similar variation is problem. I need to trim that to look like this "my-domain" or "my.domain"
Is this possible? Thanks!
function mytrim($stringToTrim) {
return trim($tringToTrim, " \t\n\r\0\x0B.-");
}
The first part of the string, " \t\n\r\0\x0B", strips white space from the beginning and ends and the second part, ".-" strips the "." and "-" characters.
Clearly you could just use trim() in your script, I just put it in a function for the example.
Related
I see this question has been asked a few times but I couldn't find an answer in php.
I have the following string.
$myString = " LLC."
I run this trim($myString);
and I get this back " LLC."
according to the trim documentation it should delete the white space in the front and the back? What am I missing?
I also tried htis trim($myString, " "); same results
The e2808d at the beginning of bin2hex() output is ZERO WIDTH JOINER character and the reason for trim() to not trim it. Try (PHP 7):
echo trim($myString, "\u{200d} \t\n\r\0\x0B");
I think this is happening because of the empty space is not really a real white space (tab) looks like a hidden character (â). i copy your variable and value code into an online PHP editor and i got this:
I'm using php to look at an XML file that has a URL in it. The URLs look something like this:
https://site.com/bacon_report?Id=1&report=1¤tDimension=2¶m=1
When I echo out the URLs, the "¤" shows up as "¤" (AKA #164, A4 or currency symbol) and the links don't work. This happens even though there isn't a closing semicolon for it. What is the cleanest way to make "¤" display literally?
Funny enough I ran into the same problem just now and I found this answer. However, I found another solution which might even be better!
Simply put the variable at the beginning of your query string, and you will avoid the ¤ completely.
Do:
https://site.com/bacon_report?currentDimension=2&Id=1&report=1¶m=1
instead of:
https://site.com/bacon_report?Id=1&report=1¤tDimension=2¶m=1
Use the php function urlencode:
urlencode("https://site.com/bacon_report?Id=1&report=1¤tDimension=2¶m=1"
will output
https%3A%2F%2Fsite.com%2Fbacon_report%3FId%3D1%26report%3D1%26currentDimension%3D2%26param%3D1
The problem here is escaping - you need to escape the "&" characters. In XML all special characters like <, >, ', " and & should be escaped.
Escape it properly as
https://example.com/bacon_report?Id=1&report=1¤tDimension=2¶m=1
..just like in HTML:
WRONG - no escaping
CORRECT - correct escape sequence
So - the cleanest way to show "¤" in HTML/XML is to properly escape the ampersand, and render it as "¤".
I think that in this case it is best to use htmlentities because with urlencode you get
https%3A%2F%2Fexample.com%2Fbacon_report%3FId%3D1%26report%3D1%26currentDimension%3D2%26param%3D1
and when applying urldecode, you will still have the ¤ symbol
where as with htmlentities the url comes out clean.
https://example.com/bacon_report?Id=1&report=1¤tDimension=2¶m=1
I came across this issue while working on technical documentation (in Markdown which gets converted to HTML).
To solve the issue I used a zero-width space character which I copied and pasted from between these brackets (). That way it appears that there is no space and can include the below without any issues:
/search?query=1¤tLonLat=-74.600291,40.360869
I have searched in vain to find a fix for this issue. I have an editable field in a web page that contains a user entered space. When I copy the space and enter it into a program called IVI32 which I guess you would call a Unicode text program, I get the following info.
The space character is defined as FFFE2000. I need to detect when this field has one or more of these spaces and nothing else. I have tried the following with preg_match:
'/\s+/u'
'/^[0 :-]+$/ '
'/\A\s*\z/'
Nothing works and I am completely stumped. Any help from some Unicode experts out there will be greatly appreciated.
There was an error in my code which was preventing anything from working properly (the product of no time off!). Here's what works for anyone else who might want to detect if an element contains only whitespace that cannot be eliminated by php trim();
if(!preg_match('/\\s/', $test_string)):-do something-
if(!preg_match('/\s+/u', $test_string)):-do something-
if(!preg_match('/[\pZ\pC]+/u', $test_string)):-do something-
For anyone who is interested the space is pasted immediately after the end of this sentence.
Would this work?
preg_match('/^ +$/', $subject);
Match a single or more spaces? Because \s will also match nonbreaking spaces, tabs, and newlines.
Have a try with:
/\p{WhiteSpace}/
I'm using php to look at an XML file that has a URL in it. The URLs look something like this:
https://site.com/bacon_report?Id=1&report=1¤tDimension=2¶m=1
When I echo out the URLs, the "¤" shows up as "¤" (AKA #164, A4 or currency symbol) and the links don't work. This happens even though there isn't a closing semicolon for it. What is the cleanest way to make "¤" display literally?
Funny enough I ran into the same problem just now and I found this answer. However, I found another solution which might even be better!
Simply put the variable at the beginning of your query string, and you will avoid the ¤ completely.
Do:
https://site.com/bacon_report?currentDimension=2&Id=1&report=1¶m=1
instead of:
https://site.com/bacon_report?Id=1&report=1¤tDimension=2¶m=1
Use the php function urlencode:
urlencode("https://site.com/bacon_report?Id=1&report=1¤tDimension=2¶m=1"
will output
https%3A%2F%2Fsite.com%2Fbacon_report%3FId%3D1%26report%3D1%26currentDimension%3D2%26param%3D1
The problem here is escaping - you need to escape the "&" characters. In XML all special characters like <, >, ', " and & should be escaped.
Escape it properly as
https://example.com/bacon_report?Id=1&report=1¤tDimension=2¶m=1
..just like in HTML:
WRONG - no escaping
CORRECT - correct escape sequence
So - the cleanest way to show "¤" in HTML/XML is to properly escape the ampersand, and render it as "¤".
I think that in this case it is best to use htmlentities because with urlencode you get
https%3A%2F%2Fexample.com%2Fbacon_report%3FId%3D1%26report%3D1%26currentDimension%3D2%26param%3D1
and when applying urldecode, you will still have the ¤ symbol
where as with htmlentities the url comes out clean.
https://example.com/bacon_report?Id=1&report=1¤tDimension=2¶m=1
I came across this issue while working on technical documentation (in Markdown which gets converted to HTML).
To solve the issue I used a zero-width space character which I copied and pasted from between these brackets (). That way it appears that there is no space and can include the below without any issues:
/search?query=1¤tLonLat=-74.600291,40.360869
while using a ajax script, I made the php part echo a value then in the jQuery part I alert it.
So we have something like this:
<?php echo "1"; ?>
//Javascript
alert("the value is"+phpvalue);
The alert shows up like "the value is 1". Now my question is how do I remove the space between the "the value is" and +phpvalue? So it show up like "the value is1". I tried trim() on the php part but it doesn't change anything.
Apreciate any help and sorry if it is a noob question =/
In http response can be some other caracters than what you print. For example, if there is spaces before php tag .. BOM character in the begining of the php file... so if you trim just the variable, that does not detemrimate, that you get purely the variable on client side without junk characters.
So you should use trim on client side in javascript:
For example jQuery trim (http://api.jquery.com/jQuery.trim/)
alert("the value is"+$.trim(phpvalue));
Or use nativ js trim function from phpjsorg (http://phpjs.org/functions/trim/):
alert("the value is"+trim(phpvalue));
Not sure exactly what you want but here are two situations
If you just are dealing with excess whitespace on the beginning or end of the string you can use trim(), ltrim() orrtrim() to remove that.
If you are dealing with extra spaces within a string consider a preg_replace of multiple whitespaces " "* with a single whitespace " "
$foo = preg_replace( '/\s+/', ' ', $foo );