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psalm/src/functions.php

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<?php
/**
* @param string $path
*
* @return bool
*/
function isAbsolutePath($path)
{
// Optional wrapper(s).
$regex = '%^(?<wrappers>(?:[[:print:]]{2,}://)*)';
// Optional root prefix.
$regex .= '(?<root>(?:[[:alpha:]]:/|/)?)';
// Actual path.
$regex .= '(?<path>(?:[[:print:]]*))$%';
$parts = [];
if (!preg_match($regex, $path, $parts)) {
throw new InvalidArgumentException(sprintf('Path is not valid, "%s" given.', $path));
}
if ('' !== $parts['root']) {
return true;
}
return false;
}