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- 函数参考
- 其它服务
- Event
- EventBuffer
EventBuffer::search
(PECL event >= 1.2.6-beta)
EventBuffer::search — Scans the buffer for an occurrence of a string
说明
public EventBuffer::search( string$what
,
int
$start
= -1
,
int
$end
= -1
): mixed
Scans the buffer for an occurrence of the string
what
. It returns numeric position of the string, or false if the string was
not found.
If the
start
argument is provided, it points to the position at which the search should
begin; otherwise, the search is performed from the start of the string. If
end
argument provided, the search is performed between start and end buffer
positions.
参数
-
what -
String to search.
-
start -
Start search position.
-
end -
End search position.
返回值
Returns numeric position of the first occurrence of the string in the
buffer, or false if string is not found.
此函数可能返回布尔值
false，但也可能返回等同于 false 的非布尔值。请阅读 布尔类型章节以获取更多信息。应使用
===
运算符来测试此函数的返回值。
范例
示例 #1 EventBuffer::search() example
<?php
// Count total occurrences of 'str' in 'buf'
function count_instances($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"));
?>
以上例程的输出类似于：
int(3)
参见
- EventBuffer::searchEol() - Scans the buffer for an occurrence of an end of line
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/eventbuffer.search.php