I am trying to create a file using php. The thus created file contains a lot of HTML content, along with some MySQL queries. The problem here lies on the line(3rd blue arrow), denoted by the downward facing arrow.
The main error here is due to redundancy in single inverted commas. Could anybody help me with the problem please?
Kindly see this image for code..
Your problem is that you're using quoted array keys within a double-quoted string. This is not permitted in PHP, though it will "politely" do the correct thing but issue a warning.
e.g.
$arr['foo'] = 'bar';
echo "This is wrong: $arr['foo']"; // wrong
echo "This is correct: $arr[foo]"; // right
echo "This is correct: {$arr['foo']}"; // also right
In all three cases, PHP will properly output 'bar' where the array reference is, the first line will cause a warning.
Related
this prints out nothing
print htmlentities($variable);
this prints out my text string that is a field from mysql that is a mediumtext. The field is 65MB
print $variable;
The question is: does htmlentities have a problem with the size of the variable or is there an obvious way (that I am missing) to debug this ?
Silly enough this is the first time I had this come up and failed to read the manual :(
The fix was to:
print htmlentities($variable,ENT_SUBSTITUTE);
my first attempt to use ENT_IGNORE allowed the string to print but may have security implications https://www.php.net/htmlentities
I apologize that I assumed this was a variable size issue, as all the other few hundred results would print, this made me think this was the only result that did not print just after enlarging the field in mysql, then all of a sudden this started happening. Instead the last bit of data I added to the field had a copyright non ascii character :( sigh
OK, so I shave my head, but if I had hair I wouldn't need a razor because I'd have torn it all out tonight. It's gone 3am and what looked like a simple solution at 00:30 has become far from it.
Please see the code extract below..
$psusername = substr($list[$count],16);
if ($psusername == $psu_value){
$answer = "YES";
}
else {
$answer = "NO";
}
$psusername holds the value "normann" which is taken from a URL in a text based file (url.db)
$psu_value also holds the value "normann" which is retrieved from a cookie set on the user's computer (or a parameter in the browser address bar - URL).
However, and I'm sure you can guess my problem, the variable $answer contains "NO" from the test above.
All the PHP I know I've picked up from Google searches and you guys here, so I'm no expert, which is perhaps evident.
Maybe this is a schoolboy error, but I cannot figure out what I'm doing wrong. My assumption is that the data types differ. Ultimately, I want to compare the two variables and have a TRUE result when they contain the same information (i.e normann = normann).
So if you very clever fellows can point out why two variables echo what appears to be the same information but are in fact different, it'd be a very useful lesson for me and make my users very happy.
Do they echo the same thing when you do:
echo gettype($psusername) . '\n' . gettype($psu_value);
Since i can't see what data is stored in the array $list (and the index $count), I cannot suggest a full solution to yuor problem.
But i can suggest you to insert this code right before the if statement:
var_dump($psusername);
var_dump($psu_value);
and see why the two variables are not identical.
The var_dump function will output the content stored in the variable and the type (string, integer, array ec..), so you will figure out why the if statement is returning false
Since it looks like you have non-printable characters in your string, you can strip them out before the comparison. This will remove whatever is not printable in your character set:
$psusername = preg_replace("/[[:^print:]]/", "", $psusername);
0D 0A is a new line. The first is the carriage return (CR) character and the second is the new line (NL) character. They are also known as \r and \n.
You can just trim it off using trim().
$psusername = trim($psusername);
Or if it only occurs at the end of the string then rtrim() would do the job:
$psusername = rtrim($psusername);
If you are getting the values from the file using file() then you can pass FILE_IGNORE_NEW_LINES as the second argument, and that will remove the new line:
$contents = file('url.db', FILE_IGNORE_NEW_LINES);
I just want to thank all who responded. I realised after viewing my logfile the outputs in HEX format that it was the carriage return values causing the variables to mismatch and a I mentioned was able to resolve (trim) with the following code..
$psusername = preg_replace("/[^[:alnum:]]/u", '', $psusername);
I also know that the system within which the profiles and usernames are created allow both upper and lower case values to match, so I took the precaution of building that functionality into my code as an added measure of completeness.
And I'm happy to say, the code functions perfectly now.
Once again, thanks for your responses and suggestions.
I'm having a problem where my PHP scripts are returning my json encoded array with a number above and a number below it. Like follows:
26
[0,"edited_token_string"]
0
I have not changed any of the scripts that I'm encountering this on, but it is happening with all of them. I don't have any other echos other than the one used to echo the array. Our server was returning "null" from all of the scripts all morning and now is returning the correct array, with these numbers surrounding it. Is it possible something was updated on the server that accidentally turned on some type of debugging? I've called our hosting service, but they are incredibly unhelpful.
Thanks in advance,
Max
Try adding header('Content-type: application/json'); directly above the line that outputs your JSON. If something else has already outputted something, you will get an error telling you where in your code that happened.
For the undesired output after the JSON, could it be that there is also an extra space after the closing ?> tag? A quick and dirty fix would be to just add die; after the last intentional echo;
I'm trying to make a dynamic menu in my web, in which only some pages from each section will appear.
The code I wrote was:
$menulist=array();
$menulist[1]='file1%#16';
$menulist[2]='file2%#9';
$menulist[3]='file3%#19';
$menulist[4]='file4%#8';
$menulist[5]='file5%#13';
$menulist[6]='file6%#14';
$menulist[7]='file7%#10';
$menulist[8]='file8%#23';
$menulist[9]='file9%#19';
$menulist[10]='file10%#18';
$menulist[11]='file11%#12';
function actualizaciones($matriz)
{
$linea=explode("%#",$matriz);
echo '<li><a href="first_chunk_of_URL'.$linea[0].'middle_chunk_of_url'.$linea[1].'last_chunk_of_URL">'.${$linea[0]}[$linea[1]].'</li>;
}
echo '<ul>';
array_walk($menulist,'actualizaciones');
echo '</ul>';
Every $linea[0] string is the name of another array (not shown in this code) which contains the text that should be in every possible link corresponding to every key passed by $linea[1].
I must have done something wrong, because the hyperlinks work fine but there's no text showing on them.
use the simple character like below
echo '<li><a href="first_chunk_of_URL'.$linea[0].'middle_chunk_of_url'.$linea[1].'last_chunk_of_URL">'.${$linea[0]}[$linea[1]].'<li>';
and the problem in your code is
.'</li>;
^^^^^
here is the problem it should be
.'</li>';
If I'm reading the question right, you're asking how to use variable variables in PHP.
This can be done using the double-dollar syntax - ie $$linea[0]. See the PHP manual for more info: http://uk.php.net/manual/en/language.variables.variable.php
But if that is what you're doing, I would say you're not writing good code: if variable variables are involved, there's almost always a better way of doing it.
Can't really offer much better assistance here without understanding more about what you're trying to do, but it sounds like you should be using subarrays rather than separate named variables for everything.
Hope that helps.
My previous question and this question both are related a bit. please have a look at my previous question I did not found any other way to unserialize the data so coming with the string operation
I am able to get the whole content from file but not able to get the specific string from this content.
I want to search a specific string from these content but function stop working when the reach at first special character in the string. If I am searching something found before the special character the works properly.
String operation function of PHP not working properly when the encounter first special character in the string and stop processing immediately, Hence they does not give me the correct output.
Originally they looks like (^#)
:"Mage_Core_Model_Message_Collection":2:{s:12:"^#*^#_messages";a:0:{}s:20:"^#*^#_lastAddedMessage";N;}
but when I did echo they are display as ?
Here is the code what I tried
$file='/var/www/html/products/var/session/sess_ciktos8icvk11grtpkj3u610o3';
$contents=file_get_contents($file);
$contents=htmlspecialchars($contents);
//$contents=htmlentities($contents);
echo $contents;
$restData=strstr($contents,'"id";s:4:"');
echo $restData;
$id=substr($restData,0,strpos($restData,'"'));
echo $id;
I changed the default_charset to iso-8859-1 and also utf-8 but not working with both
Please let me know How I can resolve this.
Thanks.
These characters that you see as ^# are actually null bytes. They don't have any proper display, neither they are meant to be displayed - it's an internal representation of protected properties in the engine. You're not supposed to mess with them.
As for resolving, it'd be nice to know what kind of resolution you seek - what result are you trying to achieve?