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Regular Expression for alphanumeric and underscores

...o or more of the given characters $ : end of string If you don't want to allow empty strings, use + instead of *. As others have pointed out, some regex languages have a shorthand form for [a-zA-Z0-9_]. In the .NET regex language, you can turn on ECMAScript behavior and use \w as a shorthand (y...
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How to parse JSON data with jQuery / JavaScript?

I have a AJAX call that returns some JSON like this: 10 Answers 10 ...
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Remove duplicate elements from array in Ruby

... array = array.uniq uniq removes all duplicate elements and retains all unique elements in the array. This is one of many beauties of the Ruby language. share | ...
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Using str_replace so that it only acts on the first match?

... There's no version of it, but the solution isn't hacky at all. $pos = strpos($haystack, $needle); if ($pos !== false) { $newstring = substr_replace($haystack, $replace, $pos, strlen($needle)); } Pretty easy, and saves the performance penalty of regular expressions. Bonus: If...
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MassAssignmentException in Laravel

...ection against mass assignment security issues. That's why you have to manually define which fields could be "mass assigned" : class User extends Model { protected $fillable = ['username', 'email', 'password']; } Warning : be careful when you allow the mass assignment of critical fields lik...
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PDOException SQLSTATE[HY000] [2002] No such file or directory

...fortrabbit, but as soon as I connect to SSH to run some commands (such as php artisan migrate or php artisan db:seed ) I get an error message: ...
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Calculate number of hours between 2 dates in PHP

... The newer PHP-Versions provide some new classes called DateTime, DateInterval, DateTimeZone and DatePeriod. The cool thing about this classes is, that it considers different timezones, leap years, leap seconds, summertime, etc. And on top of that it's very easy to use. Here...
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PHP MySQL Google Chart JSON - Complete Example

...generating a Google Chart (pie, bar, column, table) using a combination of PHP and MySQL. I finally managed to get one example working. ...
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Difference between float and double in php?

... There is no difference in PHP. float, double or real are the same datatype. At the C level, everything is stored as a double. The real size is still platform-dependent. See the manual for more details: http://www.php.net/manual/en/language.types.flo...
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How to var_dump variables in twig templates?

... layer pattern where you only present what you have been given is fine and all, but how do you know what is available? Is there a "list all defined variables" functionality in TWIG? Is there a way to dump a variable? ...