EventBuffer::search
(PECL event >= 1.2.6-beta)
EventBuffer::search — Scans the buffer for an occurrence of a string
说明
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.
参数
-
what -
String to search.
-
start -
Start search position.
-
end -
End search position.
返回值
Returns numeric position of the first occurance of the string in the
buffer, or FALSE if string is not found.
范例
Example #1 EventBuffer::search() example
<?php
// Count total occurances 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"));
?>
以上例程的输出类似于：
int(3)
参见
- EventBuffer::searchEol() - Scans the buffer for an occurrence of an end of line