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When I type:
<?php
$temp="1234";
echo "<script type='text/javascript'>document.write({$temp});</script>";
?>
I get 1234 on the screen.
But when I replace $temp="1234" with $temp="alfa" I get nothing on the screen.
What's the problem ? Where am I wrong ? "1234" and "alfa" are both strings
alert(1234) is valid javascript, and will simply pop up the integer 1234 on your screen.
alert(alfa) is attempting to pop up the contents of a variable named alfa on your screen, which doesn't exist.
If you're insert data from PHP into a Javascript context, you MUST use json_encode() to ensure that you're producing VALID javascript. e.g.
$temp = 'alfa';
$json= json_encode($temp);
echo '<script>.... {$json}...</script>';
that will produce alert('alfa') and work as expected.
You aren't enclosing the text in the double-quote character '"' which denotes a string.
document.write(1234) works because 1234 is a valid value in JavaScript (an integer), whereas alfa is a symbol name, it should be "alfa".
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Hi, I have a problem when try access to $_POST vars in php. I have a combo with this name "c012". Well, I send the form with this var, and I have checked this var is send ok, and when I try access with this code, where $var1, $var2 and $var3 are numbers:
$var1 = 0;
$var2 = 1;
$var3 = 2;
$pointer_combo = "c".$var1.$var2.$var3;
echo $_POST['$pointer_combo'];
Don't show anything, but if I try this:
echo $_POST['c012'];
Works, and show the value. Whats the problem with code above?
If you are using a dynamic index (index value stored in a variable), you don't need the quotes.
Try this:
echo $_POST[$pointer_combo];
PHP won't do variable substitution if the value is in single quotes. Only double quotes or no quotes. So
echo $_POST[$pointer_combo];
Would work, as would:
echo $_POST["$pointer_combo"];
(But obviously in that second example there isn't much point in the quotes being there!)
Lose the quotes:
$_POST[$pointer_combo];
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I want to remove a particular match of characters from a string.
For example i have strings;
topics-p10-new-model-cars
topics-p20-new-model-cars
topics-p30-new-model-cars
topics-p40-new-model-cars
Then i need the results as,
topics-new-model-cars
topics-new-model-cars
topics-new-model-cars
topics-new-model-cars
That means i want to remove p10-,p20-,etc..
.Those are the page numbers. It may be any number..
How can i do this..? Thanks in advance
Try this:
$result = preg_replace('/\-p\d+/', '', $string);
Note: I'm assuming that the string format does not change (I mean this [topics-p10-new-model-cars]). If my assumption is right.
Then you can do this
if (textBox1.Text.Contains("-p10-"))
{
//topics-p10-new-model-cars
String[] splited = textBox1.Text.Split(new char[] {'-'});
String rString = String.Format("{0}-{1}-{2}-{3}",
splited[0],splited[2],splited[3],splited[4]);
MessageBox.Show(rString);
}
//OR This method
if (textBox1.Text.Contains("-p10-"))
{
String result = textBox1.Text.Replace("p10-", "");
MessageBox.Show(result);
}
With 'preg-replace'::
For, example:
<?
echo preg_replace('/p[0-9]+\-/', '', 'topics-p10-new-model-cars');
?>
Follow this link:
http://www.php.net/manual/en/function.preg-replace.php
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I have got a file with two line. below are lines:
<?php include_once(dirname(__FILE__)."\057\144\145f\151n\x65.\160\150p");
include_once(dirname(__FILE__)."/\x62\x73\145t.ph\160"); ?>
this is not look like encoding, if encoding what type of encoding this is and how to decode it (if possible). please tell anyone.
It seems like a simple obfuscation technique. The characters are written in hexadecimal form (\x00), or octal form (\000). Have a look at this doc.
<?php
echo "\057\144\145f\151n\x65.\160\150p"; // it prints '/define.php'
echo "/\x62\x73\145t.ph\160"; // it prints '/bset.php'
?>
To decode them, just look at this table, for \x00 look the Hx column, for \000 values, the Oct one. For another method, (but printing the string it's the simplest thing to do...) you could also use the function chr(), to get the character representation:
echo chr(0x65); // print 'e', from value (hex) \x65
echo chr(0145); // still print 'e', from (oct) \145
Converting \x00 and \000 respectively to 0x00 and 0000 is left as an exercise for you:)
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For my Laravel-based site, I need to find # and # within text content and replace it with a URL, such as a URL pointing at a user's Twitter page. How can I:
reliably find these strings within text portions of the HTML
replace found instances with a URL
The code for it is vast. You will have to use ajax here, in the textarea/textbox you will have to use "onkeyup" event, every key pressed have to be compared with "#" or "#" then the next character right after "#" has to be searched in the database.
So lets saw the user has typed "#A" till now and the user aims to type "#Ankur" Then as soon as "A" is typed the ajax script will start searching for users in the database and it is retrieved with the name, url and you just have to echo it on the screen.
THis is what you are looking for.. https://stackoverflow.com/a/4277114/829533
$strTweet = preg_replace('/(^|\s)#(\w*[a-zA-Z_]+\w*)/', '\1#\2', $strTweet);
And https://stackoverflow.com/a/4766219/829533
$input = preg_replace('/(?<=^|\s)#([a-z0-9_]+)/i', '#$1', $input);
Using regex it's rather simple. I would make one function that takes a prefix and replacement, like so.
function tweetReplaceObjects($input, $prefix, $replacement) {
return preg_replace("/$prefix([A-Za-z0-9_-])/", $replacment, $input);
}
An example usage would be something like this.
$text = 'hey look, it\'s #stackoverflow over there';
// expected output:
// hey look, it's stackoverflow over there
echo tweetReplaceObjects($text, '#', '$1');
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I'm a newbie with PCRE in PHP. I'm trying to make a very basic shortcode function that could make something with a format like this one: {somealphanumericthing}
In essence I need a preg_match_all() that could find in my post these type of occurrences. I tried something like this:
$shortcode = preg_match_all('/^\b\{[a-zA-Z0-9_]+(\}\b)$/', $body, $found);
var_dump($shortcode);
if($shortcode==1) {
for($i=0;$i<count($found);$i++) {
print_r($found);
//do something nice
}
}
But unfortunately it's not working: I get int 0 to the test string {test}
A few things about the regular expression:
You don't need your line anchors since you are searching in a larger string.
There's not need to capture the closing }
Optimization, use the character class \w
Condensed:
/\b\{[a-zA-Z0-9_]+\}\b/