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46 lines
1 KiB
PHP
46 lines
1 KiB
PHP
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<?php
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/**
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* Format a regular expression. Supports the following conversions:
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*
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* %s String
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* Escapes a string using `preg_quote`.
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*
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* %R Raw
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* Inserts a raw regular expression.
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*
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* @param string sprintf()-style format string.
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* @param string Flags to use with the regular expression.
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* @param ... Zero or more arguments.
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* @return string Formatted string.
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*/
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function pregsprintf($pattern /* , ... */) {
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$args = func_get_args();
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$flags = head(array_splice($args, 1, 1));
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$delim = chr(7);
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$userdata = array('delimiter' => $delim);
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$pattern = xsprintf('xsprintf_regex', $userdata, $args);
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return $delim.$pattern.$delim.$flags;
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}
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/**
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* @{function:xsprintf} callback for regular expressions.
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*/
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function xsprintf_regex($userdata, &$pattern, &$pos, &$value, &$length) {
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$delim = idx($userdata, 'delimiter');
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$type = $pattern[$pos];
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switch ($type) {
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case 's':
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$value = preg_quote($value, $delim);
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break;
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case 'R':
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$type = 's';
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break;
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}
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$pattern[$pos] = $type;
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}
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