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Dokumen ini menggunakan Manual laman web PHP Cina Lepaskan
(PECL event >= 1.2.6-beta)
EventBuffer::search — Scans the buffer for an occurrence of a string
$what
[, int $start
= -1
[, int $end
= -1
]] )
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.
what
String to search.
start
Start search position.
end
End search position.
Returns numeric position of the first occurance 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。
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)