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Top Forums Shell Programming and Scripting Regex issue with \s in character class. Post 303042656 by Scrutinizer on Thursday 2nd of January 2020 08:56:49 AM
Old 01-02-2020
Originally Posted by Neo
Also, another FWIW:

linux# php -a
Interactive mode enabled

php > $a = ' FOO ';
php > echo preg_match('/[\s][A-Z]+[\s]/', $a,$matches);
php > echo $matches[0];
php >

so, it works in a PHP REGEX .....
POSIX regular expressions (BRE/ERE) and the GNU and BSD derivatives are the exception, rather than the norm, in that \ is not special/meta within a character class (bracket) expression.

In (I think all) other regex flavours \ is special in a character class (bracket) expression.

Shortcuts like \s are not part of POSIX BRE/ERE, but are supported as an extension in BSD and GNU implementations.

Last edited by Scrutinizer; 01-02-2020 at 10:04 AM..

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PHAR.SETMETADATA(3)							 1						       PHAR.SETMETADATA(3)

Phar::setMetadata - Sets phar archive meta-data

public void Phar::setMetadata (mixed $metadata) DESCRIPTION
Note This method requires the php.ini setting phar.readonly to be set to 0 in order to work for Phar objects. Otherwise, a PharException will be thrown. Phar.setMetadata(3) should be used to store customized data that describes something about the phar archive as a complete entity. PharFile- Info.setMetadata(3) should be used for file-specific meta-data. Meta-data can slow down the performance of loading a phar archive if the data is large. Some possible uses for meta-data include specifying which file within the archive should be used to bootstrap the archive, or the location of a file manifest like PEAR's package.xml file. However, any useful data that describes the phar archive may be stored. PARAMETERS
o $metadata - Any PHP variable containing information to store that describes the phar archive RETURN VALUES
No value is returned. EXAMPLES
Example #1 A Phar.setMetadata(3) example <?php // make sure it doesn't exist @unlink('brandnewphar.phar'); try { $p = new Phar(dirname(__FILE__) . '/brandnewphar.phar', 0, 'brandnewphar.phar'); $p['file.php'] = '<?php echo "hello"'; $p->setMetadata(array('bootstrap' => 'file.php')); var_dump($p->getMetadata()); } catch (Exception $e) { echo 'Could not create and/or modify phar:', $e; } ?> The above example will output: array(1) { ["bootstrap"]=> string(8) "file.php" } SEE ALSO
Phar.getMetadata(3), Phar.delMetadata(3), Phar.hasMetadata(3). PHP Documentation Group PHAR.SETMETADATA(3)

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