EventBuffer::search
Scans the buffer for an occurrence of a string
説明
public
mixed EventBuffer::search(
string
$what
,
int
$start
= -1
,
int
$end
= -1
)
If the
start
argument is provided, it points to the position at which the search should
begin; otherwise, the search is performed from the start of the string. If
end
argument provided, the search is performed between start and end buffer
positions.
パラメータ
-
what
-
String to search.
-
start
-
Start search position.
-
end
-
End search position.
戻り値
Returns numeric position of the first occurrence of the string in the
buffer, or false if string is not found.
警告この関数は論理値
false を返す可能性がありますが、false として評価される値を返す可能性もあります。
詳細については 論理値の
セクションを参照してください。この関数の返り値を調べるには
===演算子 を
使用してください。
例
例1
EventBuffer::search example
<?php
// Count total occurrences of 'str' in 'buf'
function count_instances($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"));
?>