EventBuffer::search
(PECL event >= 1.2.6-beta)
EventBuffer::search — Scans the buffer for an occurrence of a string
說明
Scans the buffer for an occurrence of the string what . It returns numeric position of the string, or false if the string was
not found.
If the start argument is provided, it points to the position at which the search should
begin; otherwise, the search is performed from the start of the string. If end argument provided, the search is performed between start and end buffer
positions.
參數
-
what String to search.
-
start Start search position.
-
end End search position.
返回值
Returns numeric position of the first occurrence of the string in the
buffer, or false if string is not found.
範例
示例 #1 EventBuffer::search() example
<?php
// Count total occurrences of 'str' in 'buf'
function count_instances($buf, $str) {
$total = 0;
$p = 0;
$i = 0;
while (1) {
$p = $buf->search($str, $p);
if ($p === FALSE) {
break;
}
++$total;
++$p;
}
return $total;
}
$buf = new EventBuffer();
$buf->add("Some string within a string inside another string");
var_dump(count_instances($buf, "str"));
?> 以上例程的輸出類似於：
int(3)
參見
- EventBuffer::searchEol() - Scans the buffer for an occurrence of an end of line