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Digg  strcspn
Find length of initial segment not matching mask
(PHP 4, PHP 5)
Related Examples ( Source code ) » strcspn Examples ( Source code ) » strcspn($password, '1234567890') Examples ( Source code ) » strcspn Demo Code Examples / Notes » strcspnmaskedcoder
useful for finding beginning of quotes and/or tags in a variable containing html. $pos = strcspn($data, '<"\''); will find the first occurance of either the beginning of a tag, or a double- or single-quoted string. at-he at_he
this function can be used like strspn(), except while that can be used to compare a string with an allowed pattern, this one can be use to compare a string with a FORBIDDEN pattern so, to know if any forbidden character has a position inside our string, we can use (not tested with backslashes)... <?php // LARGE VERSION $forbidden="\"\\?*:/@|<>"; if (strlen($filename) != strcspn($filename,$forbidden)) { echo "you cant create a file with that name!"; } // SHORT VERSION if (strlen($filename) - strcspn($filename,"\"\\?*:/@|<>")) { echo "i told you, you cant create that file"; } ?> php
Also useful for breaking down expressions - for example parsing SQL: values ('this', fn("that,)()", 4)) $sep = strcspn ($list, "'\"`"); // Start of quoted string $list = substr ($list, $sep); $find = substr ($list, 0, 1); while (($sep = strpos ($list, $find, $sep+1)) > 0 && substr ($list, $sep-1, 1) == '\\') {} // $sep now spans the entire string, regardless of embedded quotes Once the strings have been removed, an expression can then be parsed for commas and brackets without worrying about them: while ($out != '') { $sep = strcspn ($list, "(),"); // Next seperator ... } |
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addcslashes addslashes bin2hex chop chr chunk_split convert_cyr_string convert_uudecode convert_uuencode count_chars crc32 crypt echo explode fprintf get_html_translation_table hebrev hebrevc html_entity_decode htmlentities htmlspecialchars_decode htmlspecialchars implode join levenshtein localeconv ltrim md5_file md5 metaphone money_format nl_langinfo nl2br number_format ord parse_str printf quoted_printable_decode quotemeta rtrim setlocale sha1_file sha1 similar_text soundex sprintf sscanf str_getcsv str_ireplace str_pad str_repeat str_replace str_rot13 str_shuffle str_split str_word_count strcasecmp strchr strcmp strcoll strcspn strip_tags stripcslashes stripos stripslashes stristr strlen strnatcasecmp strnatcmp strncasecmp strncmp strpbrk strpos strrchr strrev strripos strrpos strspn strstr strtok strtolower strtoupper strtr substr_compare substr_count substr_replace substr trim ucfirst ucwords vfprintf vprintf vsprintf wordwrap |
