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- <?php
- /**
- * Shaarli utilities
- */
- /**
- * Returns the small hash of a string, using RFC 4648 base64url format
- *
- * Small hashes:
- * - are unique (well, as unique as crc32, at last)
- * - are always 6 characters long.
- * - only use the following characters: a-z A-Z 0-9 - _ @
- * - are NOT cryptographically secure (they CAN be forged)
- *
- * In Shaarli, they are used as a tinyurl-like link to individual entries,
- * e.g. smallHash('20111006_131924') --> yZH23w
- */
- function smallHash($text)
- {
- $t = rtrim(base64_encode(hash('crc32', $text, true)), '=');
- return strtr($t, '+/', '-_');
- }
- /**
- * Tells if a string start with a substring
- */
- function startsWith($haystack, $needle, $case=true)
- {
- if ($case) {
- return (strcmp(substr($haystack, 0, strlen($needle)), $needle) === 0);
- }
- return (strcasecmp(substr($haystack, 0, strlen($needle)), $needle) === 0);
- }
- /**
- * Tells if a string ends with a substring
- */
- function endsWith($haystack, $needle, $case=true)
- {
- if ($case) {
- return (strcmp(substr($haystack, strlen($haystack) - strlen($needle)), $needle) === 0);
- }
- return (strcasecmp(substr($haystack, strlen($haystack) - strlen($needle)), $needle) === 0);
- }
- ?>
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