I'm rendering some HTML that uses the pseduo before element to render bullet points by setting the content value
.lst-kix_mnfdzhrfoeyd-0>li:before {
content: "\0025cf";
}
But when I'm printing this in PHP the string is truncated to 5cf which means the bullet points won't render.
I've tested this with a simple PHP script and can confirm it happens. Any suggestions? As you can see from the var_dump the preceding character is present as the character count is 4.
<?php
$s = "\0025cf";
print $s;
// 5cf
var_dump($s);
// string(4) "5cf"
Update:
I wrongly put single quotes in the PHP example, but was infact using double-quotes. Having changed the assignment of the string the necessary HTML to use a string literal there is no need to escape the characters. As pointed out in the comments.
Thanks.
If you want to literally output \0025cf then it's as easy as echo "\\0025cf";
If you want to output the character represented by that code, it's not as easy. If you're outputting to HTML context, then try echo "●";.
try this
$s = "\\0025cf";
echo $s;
Related
Every time I try to echo a string there is no new line. I how can I make a newline when calling echo in php using the $_GET?
here is my code:
<?php
$text = "Hello world";
$text2 = $_GET['msg'];
echo $text2
?>
and this is what I enter in the url:
http://localhost/hello.php?msg=hello%0Dworld
or this one:
http://localhost/hello.php?msg=hello%0Aworld
and even this one:
http://localhost/hello.php?msg=hello%0D%0Aworld
The echo has to be a newline please don't say I should use a different method than $_GET. It has to be $_GET
While performing your exercises you are creating an HTML page.
HTML is a special markup language, which renders according to set of rules, some of them are:
<> characters has a special meaning of control structures named tags
all newline characters are ignored
to make a newline on the page, one have to use suitable tag - such as <br>, <p> or whatever.
So, to make a newline appear on your page, you have to convert newline characters to tags. Either use nl2br() function to get a <br /> tag or str_replace() if you want any other one
Be aware that echoing any request variables without validating them is a considerable security risk! If you want to publish any application with this code it needs to be redesigned.
As common sense states, the conversion from urlencoded to the corresponding character is automatically done by php, but HTML does not render such characters, so you either need to convert them into linebreaks or enclose the message in <pre> tags.
I am trying to obtain a number from a function which only echos text instead of returning it to a variable as follows:
ob_start();
function_to_get_id_number();
$thisIDnumber = ob_get_clean();
If I echo the $thisIDnumber variable, the desired number is printed in the HTML output.
However, running var_dump($thisIDnumber) outputs the following: string(18) "7"
(Assuming the number was 7, although var_dump() reports an 18-character string regardless of what the number might be.)
Any attempt to convert the string to an integer (e.g. (int)$thisIDnumber , or int_val($thisIDnumber), or $thisIDnumber = 0+$thisIDnumber fails and the output is 0)
Running mb_detect_encoding($thisIDnumber) reports the string to be ASCII encoded.
I'm not really sure how to get around this, but would very greatly appreciate any suggestions or insights! Many thanks in advance!
The string(18) part could be explained if the function prints lots of white space (spaces, tabs or even carriage returns) and you inspect var_dump()'s output through a web browser (so it renders as HTML and spaces are collapsed). However, casting to number should ignore regular leading spaces. So there's possibly some other non-printable character out there.
Try this:
ob_start();
function_to_get_id_number();
$thisIDnumber = ob_get_clean();
var_dump($thisIDnumber, bin2hex($thisIDnumber));
The hexadecimal code should give you a clue of what's inside the string.
Update:
$data = '5b777073635f63617465676f72795f69645d';
for($i=0, $len=strlen($data); $i<$len; $i+=2){
echo chr(hexdec(substr($data, $i, 2)));
}
... prints this:
[wpsc_category_id]
:-?
You have not provided much information to work with, so this is a shot in the dark.
Why don't you try this:
If the id is numeric by definition, enforce it by removing everything else using a regular expression.
(As jproffit wrote in his comment to your question: more info on function_to_get_id_number() would be nice. Why do you need to buffer the output in the first place? Can't function_to_... return a proper value instead of outputting a string?)
Why does this code
$string = "!##$%^&*(<a#g.com";
echo $string;
only output:
!##$%^&*(
Is this is a PHP bug?
Because < is a reserved character in in HTML :)
Use < and >
Read this for more information
http://www.w3schools.com/HTML/html_entities.asp
You can use the function htmlspecialchars to convert such special chars
http://php.net/manual/en/function.htmlspecialchars.php
I'm not seeing that:
http://ideone.com/zhycx
Perhaps you've got some weird characters in your file? Make sure you're using a "normal" encoding on your source code, as well.
You need to do:
echo htmlentities($string);
to display the string as it is on a browser. This is because the < in the string is interpreted by the browser as start of a HTML tag.
So it's not PHP but the browser that is causing this behavior. If you do the exact same display on a command line, you'll see all the characters.
If you are viewing the output in a web browser, then the < begins a tag and is usually not displayed but interpreted in the HTML document structure parser. Also, a $ inside of a double-quoted string is interpolated as the variable name that follows it; try using single quotes where this won't happen.
Try this:
$string = '!##$%^&*(<a#g.com';
echo htmlentities($string);
I'm having a bit of a problem. I am trying to create an IRC bot, which has an ampersand in its password. However, I'm having trouble putting the ampersand in a string. For example...
<?php
$var = "g&abc123";
echo $var;
?>
I believe this should print g&abc123. However it's printing g.
I have tried this as well:
<?php
$arr = array("key" => "g&abc123");
print_r($arr);
?>
This prints it correctly with the g&abc123, however when I say echo $arr['key']; it prints g again. Any help would be appreciated. I'm running PHP5.3.1.
EDIT: Also, I just noticed that if I use g&abc123&abc123 it prints g&abc123. Any suggestions?
I don't have that issue in a console:
php > $d="g&abc123";
php > echo $d;
g&abc123
What environment are you printing the output to? It sounds like you are viewing it in a web browser, and the & is being interpreted as a malformed HTML entity. Try replacing the & symbol with the entity encoded version &.
Look at the source code, it will be printing the correct code.
If you want it to print out correctly in HTML, then run htmlentities on it or make the & &
View the web page source to make sure your variable contains the correct value.
You're probably sending your output to a Web browser.
The correct way of doing it is
In HTML, XHTML and XML, the ampersand has a special meaning. It is used for character entities. You can think of it as an escape sequence of sorts.
For instance, in PHP, this would be illegal:
$variable = 'It's Friday';
This is because the apostrophe is interpreted by PHP as the end of your string, and the rest of your content looks like garbage.
Instead, you have to say:
$variable = 'It\'s Friday';
Similarly, in HTML and XHTML, you can't say
<h1>Inequalities</h1>
<p> x<yz+3 </p>
This is because it would be interpreted as an element.
Instead, you'd have to say:
<h1>Inequalities</h1>
<p> x<yz+3 </p>
Now, as you can see, the ampersand itself has a special meaning and, therefore, needs to be escaped as &. htmlspecialchars() will do it for you.
I have some php code in a database like so
$x = "<?php some code here ?>";
but I want to output that whole line to the browser without php evaluating it. Right now it is evaluating it unfortunately. I thought about escaping it but that didn't work. How might a person accomplish this?
Thanks
EDIT:
<?php
echo '<? hey ?>';
echo "<dog dog>";
?>
if I run that code the dog dog tag shows up in the browser source code where as <? hey ?> does not. It seems like it would still be evaluating it.
Edit, got the answer, thanks everyone.
Just do:
echo htmlspecialchars($x);
'Single quotes' tell PHP to interpert the string exactly as is. It will include all whitespace and characters exactly as is.
"Double Quotes" tell PHP to parse the string. This reduces whitespace, replaces variables, and parses any other magic string things.
Finally, `backticks` are used for shell commands.
If you are trying to display it in a browser exactly like that, you might want to try htmlentities($string).
Do you want it to appear like that? If so, you'll need to use < and > (strictly only the < is necessary) to encode the string.
use '(single quotes) instead of "(double quotes)
Ih PHP double quotes evaluate expressions, single quotes do not so:
$a = 123;
$b = "value of $a"; // value of 123
$c = 'value of $a'; // value of $a
The only problem with single quotes is they don't understand characters like \n for newlines (that will be printed as \n not a newline when put in single quotes).
So is all you need:
echo '<?php some code here ?>';
?
For more information see Strings in the PHP manual.
You're a bit unclear about what gets evaluated.
If you're talking about variables, there are plenty of correct answers here.
If you're talking about the <? ?> block, something's wrong. That string should not be evaluated if within a PHP block (If you mean the opening and closing PHP statements).
Maybe you are missing the opening and closing <? ?> before and after your operation?
If you're outputting php code you might even consider using highlight_string which will perform syntax highlighting on the input