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How to validate an email address in PHP
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The easiest and safest 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'...
How do you check in python whether a string contains only numbers?
...mpatibility superscript digits. This covers digits which cannot be used to form numbers in base 10, like the Kharosthi numbers. Formally, a digit is a character that has the property value Numeric_Type=Digit or Numeric_Type=Decimal.
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What exactly does Perl's “bless” do?
...e is no subroutine foo in package "Class", a list of other packages (taken form the array @ISA in the package "Class") will be searched and the first subroutine foo found will be called.
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java.lang.IllegalStateException: Cannot (forward | sendRedirect | create session) after response has
...or sendError() methods are invoked via Java code embedded in a JSP file in form of old fashioned way <% scriptlets %>, a practice which was officially discouraged since 2001. For example:
<!DOCTYPE html>
<html lang="en">
<head>
...
</head>
<body&...
React ignores 'for' attribute of the label element
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That has absolutely nothing to do with that. The JSX transformation could just translate it to 'class' which is also valid for property names. In fact, in Preact, you can use both class and className.
– Malte R
Jan 27 at 22:32
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Is div inside list allowed? [duplicate]
... see
<!ELEMENT li %Flow;>
<!ENTITY % Flow "(#PCDATA | %block; | form | %inline; | %misc;)*">
<!ENTITY % block
"p | %heading; | div | %lists; | %blocktext; | fieldset | table">
Thus div, p etc. can be inside li (according to XHTML 1.0 Strict DTD from w3.org).
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jQuery get value of select onChange
...is is quite late but if you are using the keyboard (tabbing) to navigate a form and use the up/down arrows to choose from a dropdown list then FireFox (22.0) does not trigger the change event. You need to additionally bind keypress for FireFox. Additional Info: jQuery 1.10.2 using the syntax $('sele...
How to enable or disable an anchor using jQuery?
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I tried with those "attr" it is working only on form element not on Anchor tag.
– Senthil Kumar Bhaskaran
Jul 22 '09 at 12:09
1
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How do I get the current version of my iOS project in code?
...* build = [self build];
NSString * versionBuild = [NSString stringWithFormat: @"v%@", version];
if (![version isEqualToString: build]) {
versionBuild = [NSString stringWithFormat: @"%@(%@)", versionBuild, build];
}
return versionBuild;
}
Gist: https://gist.github.com/ash...
How many spaces will Java String.trim() remove?
...d trailing whitespace, which includes space, tab, newline carriage return, form feed, ... and which excludes characters that aren't leading or trailing.
– Marquis of Lorne
Nov 29 '14 at 8:49
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