How to capitalize first letter of first word in a sentence?

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I am trying to write a function to clean up user input.

I am not trying to make it perfect. I would rather have a few names and acronyms in lowercase than a full paragraph in uppercase.

I think the function should use regular expressions but I'm pretty bad with those and I need some help.

If the following expressions are followed by a letter, I want to make that letter uppercase.

 "."
 ". " (followed by a space)
 "!"
 "! " (followed by a space)
 "?"
 "? " (followed by a space)

Even better, the function could add a space after ".", "!" and "?" if those are followed by a letter.

How this can be achieved?

Answers

$output = preg_replace('/([.!?])s*(w)/e', "strtoupper('\1 \2')", ucfirst(strtolower($input)));

Since the modifier e is deprecated in PHP 5.5.0:

$output = preg_replace_callback('/([.!?])s*(w)/', function ($matches) {
    return strtoupper($matches[1] . ' ' . $matches[2]);
}, ucfirst(strtolower($input)));

Saturday, November 26, 2022

woleb20026-665574e3a59d

There are many different approaches to XSS that are secure. The only why to know if your approach holds water is to test though exploitation. I recommend using a Free XSS vulnerability Scanner*, or the open source wapiti.

To be honest I'll never use strip_tags() becuase you don't always need html tags to execute javascript! I like htmlspecialchars($var,ENT_QUOTES); .

For instance this is vulnerable to xss:

print('<A HREF="http://www.xssed.com/'.strip_tags($_REQUEST[xss]).'">link</a>');

You don't need <> to execute javascript in this case because you can use onmouseover, here is an example attack:

$_REQUEST[xss]='" onMouseOver="alert(/xss/)"';

The ENT_QUOTES will take care of the double quotes which will patch this XSS vulnerability.

*I am affiliated with this site/service.

Tuesday, September 6, 2022

bash.d

There's a good answer here:

function toTitleCase(str) {
    return str.replace(/wS*/g, function(txt){
        return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
    });
}

or in ES6:

var text = "foo bar loo zoo moo";
text = text.toLowerCase()
    .split(' ')
    .map((s) => s.charAt(0).toUpperCase() + s.substring(1))
    .join(' ');

Monday, October 24, 2022

geza

You can use the following substitution:

s/<./u&/g

< matches the start of a word
. matches the first character of a word
u tells Vim to uppercase the following character in the substitution string (&)
& means substitute whatever was matched on the left-hand side
g means substitute all matches, not only the first

Tuesday, November 15, 2022

daniel_wutz

You're looking for .val():

$("#commentField").val('');

Example: http://jsfiddle.net/andrewwhitaker/q6eLV/

Friday, October 28, 2022

2diabolos.com

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How to capitalize first letter of first word in a sentence?

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php,regex,user-input,text-segmentation