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PHP - concatenate or directly insert variables in string

I am wondering, What is the proper way for inserting PHP variables into a string? This way: 14 Answers ...
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WordPress is giving me 404 page not found for all pages except the homepage

All of a sudden I go to my WordPress website and all the pages give me a 404 page not found page. I'm assuming the problem lies with the permalink structure, which I could swear I did not touch. The permalink setting is on "month and name." ...
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How do I get the entity that represents the current user in Symfony2?

...ct the Security service via auto-wiring in the controller like this: <?php use Symfony\Component\Security\Core\Security; class SomeClass { /** * @var Security */ private $security; public function __construct(Security $security) { $this->security = $securit...
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Have nginx access_log and error_log log to STDOUT and STDERR of master process

...our entrypoint (executed after volumes are mounted) or not use a volume at all (e.g. when logs are already collected by a central logging system). share | improve this answer | ...
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PHPMailer character encoding issues

I try to use PHPMailer to send registration, activation. etc mail to users: 11 Answers ...
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Difference between “!==” and “==!” [closed]

...e is that there is no operator ==!. This expression: $a ==! $b Is basically the same as this: $a == (!$b) share | improve this answer | follow | ...
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@ character before a function call

What is the difference between these two function calls in PHP? 5 Answers 5 ...
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Add number of days to a date

... about taking their date calculations seriously - its easy to forgot about all of the exceptions. – JJ Rohrer Jul 24 '14 at 18:28 ...
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Finding the number of days between two dates

... What about leap seconds? Not all days have exactly 24*60*60 seconds. This code might be sufficient for practical purposes but it's not exact in sone extremely rare edge cases. – Benjamin Brizzi Aug 1 '12 at 8:15 ...
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Only variables should be passed by reference

...file_name) cannot be turned into a reference. This is a restriction in the PHP language, that probably exists for simplicity reasons. share | improve this answer | follow ...