How to call a function using multiple lines in php? - php

I want to do something like this:
$db->store($arg1,$arg2,$arg3,$arg4,$arg5, \
$arg6,$arg7,$arg8,$arg9,$arg10, \
$arg11,$arg12,$arg13,$arg14,$arg15)
But that doesn't work, how would I go about doing this??


Just remove the slashes. PHP ignores EOLs (end-of-line).
$db->store($arg1,$arg2,$arg3,$arg4,$arg5,
$arg6,$arg7,$arg8,$arg9,$arg10,
$arg11,$arg12,$arg13,$arg14,$arg15)
;


You do not need the \, since PHP ignores all whitespace characters in your source code (except for the ones in strings of course). Just leave it out.


You don't need the slashes, or in fact, anything at all.
You do need to end with a semi-colon though, which you've missed out.

Related

Backslashes breaking string in PHP

I have an issue. I'm trying to write a string with ASCII text like this: '/\'. But whenever I do that the backslash screws up the code by canceling out the quote defining it a string therefore screwing it up. Is there anyway to cancel out the backslash so it doesn't cancel out the quote? Thanks guys!

The \ is special character, that says: 'The next character has special meaning'.
So if you want to dispaly \ you should write... \\ to get one \ in output

It would be very helpful to show what you have tried, but this will produce the exact output you requested (as shown by SO)
echo '\'/\\' . "'\n" ;
'/\'
It should also give you an idea of how backslash escaping works in different types of strings.

A great solution when writing stuff like that is HEREDOC. Inside a heredoc block you don't need to worry about escaping anything, it will just be text.
For example:
echo <<<TEXT
/|\/|\/|\/|\/|\/|\/|\/|\/|\/|\
TEXT;
There is one catch. PHP will break if you don't align the echo at the start of the line, or if the TEXT; is not aligned at the start of the line.
Heredoc can also be assigned to a variable, like so:
$var = <<<SOME_MORE_TEXT
/|\/|\/|\/|\/|\/|\/|\/|\/|\/|\
SOME_MORE_TEXT;
Finally, HEREDOC preserves tabs and spaces. Which also might come in handy when doing ASCII art.
Refer to: http://php.net/manual/en/language.types.string.php for more information.

You only need to escape the final one when using single quotes.
$var = 'backslash\backslash\backslash\\';
// output is:
// backslash\backslash\backslash\

variable name with 'current' word in php adds special character [duplicate]

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&currentDimension=2&param=1
When I echo out the URLs, the "&curren" 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 "&curren" 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 &curren completely.
Do:
https://site.com/bacon_report?currentDimension=2&Id=1&report=1&param=1
instead of:
https://site.com/bacon_report?Id=1&report=1&currentDimension=2&param=1

Use the php function urlencode:
urlencode("https://site.com/bacon_report?Id=1&report=1&currentDimension=2&param=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&currentDimension=2&param=1
..just like in HTML:
WRONG - no escaping
CORRECT - correct escape sequence
So - the cleanest way to show "&curren" in HTML/XML is to properly escape the ampersand, and render it as "&curren".

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 &curren symbol
where as with htmlentities the url comes out clean.
https://example.com/bacon_report?Id=1&report=1&currentDimension=2&param=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&currentLonLat=-74.600291,40.360869

How to get &curren to display literally, not as an HTML entity

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&currentDimension=2&param=1
When I echo out the URLs, the "&curren" 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 "&curren" 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 &curren completely.
Do:
https://site.com/bacon_report?currentDimension=2&Id=1&report=1&param=1
instead of:
https://site.com/bacon_report?Id=1&report=1&currentDimension=2&param=1

Use the php function urlencode:
urlencode("https://site.com/bacon_report?Id=1&report=1&currentDimension=2&param=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&currentDimension=2&param=1
..just like in HTML:
WRONG - no escaping
CORRECT - correct escape sequence
So - the cleanest way to show "&curren" in HTML/XML is to properly escape the ampersand, and render it as "&curren".

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 &curren symbol
where as with htmlentities the url comes out clean.
https://example.com/bacon_report?Id=1&report=1&currentDimension=2&param=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&currentLonLat=-74.600291,40.360869

unlink() doesn't work with double backslashes

I'm trying to delete a file this way:
define('DESTINATION_FOLDER','c:\temp\\');
unlink(DESTINATION_FOLDER.$dest_filename);
And $dest_filename is something like this: 2jfioj23488hgh83hr.zip
But this doesn't work. When I put the path in a variable and echo it, it prints:
c:\temp\2jfioj23488hgh83hr.zip
Then I copy/paste it in unlink():
unlink('c:\temp\2jfioj23488hgh83hr.zip')
And it works. I think the problem is with the double backslashes. But how should I define the path without using the double backslashes? I don't know why it doesn't work. The line just above this code is:
copy((DESTINATION_FOLDER.$dest_filename),($extract.'\\'.$dest_filename));
And it works fine, but unlink doesn't work with the same syntax.

Putting my comment as an answer to the question
Try using forward slashes instead of backslash :)

If for some reason you must use backslashes, then you need to use c:\\ instead of c:\
define('DESTINATION_FOLDER','c:\\temp\\');

How do halt repeating back slashes?

My PHP application adds backslashes to quotes in many locations with addslashes(). Unfortunately, this adding has produced output akin to the following.
Every time I refresh my page, this string increases in number of back slashes.
don't
don\'t
don\\'t
don\\\\'t
don\\\\\\\\'t
and so on.
I want to write a function that deletes all these extra back slashes. I have tried
str_replace($text, "\\\\", "");
to no avail.

You may just use:
stripslashes($text);

$text=preg_replace('/\134+/',"\134",$text);

What happens if your actual value happens to include \\ legitimately? For instance, if your content were referring to a Windows-style share reference - \\192.168.1.1\foo. If you blindly strip out any double slashes, you'll strip out ones that are meant to be there, as well.
The "right" answer is really to not add slashes to things that don't need them. You should know whether a given value is already escaped or not (after all, you're the one controlling where every value comes from, and what it's being used for) and only add slashes when you need them.

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