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How can I check if a URL exists via PHP?
...
Here:
$file = 'http://www.example.com/somefile.jpg';
$file_headers = @get_headers($file);
if(!$file_headers || $file_headers[0] == 'HTTP/1.1 404 Not Found') {
$exists = false;
}
else {
$exists = true;
}
From here and right below the above post, there's a curl solution:
func...
PHP validation/regex for URL
...lieve I've run into issues, but I'm sure it's not exhaustive:
$text = preg_replace(
'#((https?|ftp)://(\S*?\.\S*?))([\s)\[\]{},;"\':<]|\.\s|$)#i',
"'<a href=\"$1\" target=\"_blank\">$3</a>$4'",
$text
);
Most of the random junk at the end is to deal with situations like http:/...
Tool to Unminify / Decompress JavaScript [closed]
...e, I said base 62 : dean.edwards.name/packer and en.wikipedia.org/wiki/Base_62
– Fabien Ménager
May 5 '09 at 6:25
4
...
remove legend title in ggplot
...
You were almost there : just add theme(legend.title=element_blank())
ggplot(df, aes(x, y, colour=g)) +
geom_line(stat="identity") +
theme(legend.position="bottom") +
theme(legend.title=element_blank())
This page on Cookbook for R gives plenty of details on how to customize ...
Colorizing text in the console with C++
...d a little Color to your Console Text
HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
// you can loop k higher to see more color choices
for(int k = 1; k < 255; k++)
{
// pick the colorattribute k you want
SetConsoleTextAttribute(hConsole, k);
cout << k << " I ...
Place cursor at the end of text in EditText
...urrent ediitext value itself and call append();
myedittext.append("current_this_edittext_string");
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Regular expression \p{L} and \p{N}
...not be using alternation when a character class would suffice:
[\p{L}\p{N}_.-]*
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Shortcut to create properties in Visual Studio?
...te: public int MyProperty { get; private set; }
– Amc_rtty
Nov 26 '12 at 0:17
3
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jQuery: checking if the value of a field is null (empty)
... "NULL". You want to check if it's an empty string instead:
if ($('#person_data[document_type]').val() != ''){}
or:
if ($('#person_data[document_type]').val().length != 0){}
If you want to check if the element exist at all, you should do that before calling val:
var $d = $('#person_data[docum...
How to validate an email address in PHP
...t way to check whether an email address is well-formed is to use the filter_var() function:
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
// invalid emailaddress
}
Additionally you can check whether the domain defines an MX record:
if (!checkdnsrr($domain, 'MX')) {
// domain is not v...