Lines Matching defs:length

72      * Return part of a string given character offset (and optionally length)
76      * @param int $length (optional) length in UTF-8 characters from offset
82     public static function substr($str, $offset, $length = null)
85             if ($length === null) {
89             return mb_substr($str, $offset, $length);
97          * offset and length, we'll repeat a group of 65535 characters when needed (ok, up to MAXINT-65536)
99          * substr documentation states false can be returned in some cases (e.g. offset > string length)
103          * we only carry it out when necessary. It isn't necessary for +ve offsets and no specified length
109         if ($length !== null) $length = (int)$length;
112         if ($length === 0) return '';
113         if ($offset < 0 && $length < 0 && $length < $offset) return '';
125         // establish a pattern for offset, a non-captured group equal in length to offset
136         // establish a pattern for length
137         if ($length === null) {
143             if ($length > 0) {
144                 // reduce any length that would go past the end of the string
145                 $length = min($strlen - $offset, $length);
146                 $Lx = (int)($length / 65535);
147                 $Ly = $length % 65535;
148                 // +ve length requires ... a captured group of length characters
151             } elseif ($length < 0) {
152                 if ($length < ($offset - $strlen)) return '';
153                 $Lx = (int)((-$length) / 65535);
154                 $Ly = (-$length) % 65535;
155                 // -ve length requires ... capture everything except a group of -length characters
173      * @param int $length If given and is positive, it represents the length of the portion of string which is
174      *                            to be replaced. If length is zero then this function will have the effect of inserting
181     public static function substr_replace($string, $replacement, $start, $length = 0)
186         $ret .= self::substr($string, $start + $length);
357         $length = null;
359         while ($length === null || $length < $offset) {
365             $length = self::strlen(substr($haystack, 0, $pos));
367             if ($length < $offset)
368                 $comp = $pos - $length;
371         return $length;