(PECL event >= 1.2.6-beta)
EventBuffer::search — Scans the buffer for an occurrence of a string
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 occurrence of the string in the
buffer, or false if string is not found.
Questa funzione può
restituire il Booleano false, ma può anche restituire un valore non-Booleano valutato
come false. Fare riferimento alla sezione Booleans per maggiori
informazioni. Usare l'operatore ===
per controllare il valore restituito da questa
funzione.
Example #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"));
?>Il precedente esempio visualizzerà qualcosa simile a:
int(3)