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PHP prepend leading zero before single digit number, on-the-fly [duplicate]

PHP - Is there a quick, on-the-fly method to test for a single character string, then prepend a leading zero? 3 Answers ...
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Unable to find the wrapper “https” - did you forget to enable it when you configured PHP?

...being said I'll list out exactly everything I've done so far. I am running PHP 5.2.14 with Zend Debugging on the latest Eclipse version on my Windows XP computer. I have a 1 GB of RAM. I have XAMPP running with Apache, MySQL, and FileZilla installed. ...
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How to copy a file from one directory to another using PHP?

Say I've got a file test.php in foo directory as well as bar . How can I replace bar/test.php with foo/test.php using PHP ? I'm on Windows XP, a cross platform solution would be great but windows preferred. ...
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PHP Difference between array() and []

I'm writing a PHP app and I want to make sure it will work with no errors. 5 Answers 5...
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Reference assignment operator in PHP, =&

What does the =& (equals-ampersand) assignment operator do in PHP? 4 Answers 4 ...
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How do I turn off PHP Notices?

I've already commented out display_errors in php.ini , but is not working. 16 Answers ...
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Parse error: Syntax error, unexpected end of file in my PHP code

...You should avoid this (at the end of your code): {?> and this: <?php} You shouldn't put brackets directly close to the open/close php tag, but separate it with a space: { ?> <?php { also avoid <? and use <?php ...
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What does a \ (backslash) do in PHP (5.3+)?

What does a \ do in PHP? 4 Answers 4 ...
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How does “do something OR DIE()” work in PHP?

I'm writing a php app to access a MySQL database, and on a tutorial, it says something of the form 4 Answers ...
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List all the files that ever existed in a Git repository

...ff create A database/migrations/2014_10_12_000000_create_users_table.php A database/migrations/2014_10_12_100000_create_password_resets_table.php A database/migrations/2015_05_11_200932_create_boletin_table.php A database/migrations/2015_05_15_133500_create_usuarios_table.php...