(PHP 4, PHP 5, PHP 7)
strrpos — 锟斤拷锟斤拷指锟斤拷锟街凤拷锟斤拷锟斤拷目锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟揭伙拷纬锟斤拷值锟轿伙拷锟�
$haystack
, string $needle
[, int $offset = 0
] ) : int
锟斤拷锟斤拷锟街凤拷锟斤拷 haystack 锟斤拷 needle 锟斤拷锟揭伙拷纬锟斤拷值锟斤拷锟斤拷锟轿伙拷谩锟阶拷锟� PHP4 锟叫ｏ拷needle 只锟斤拷为锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷锟� needle 锟斤拷指锟斤拷为一锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷么锟斤拷锟斤拷使锟矫碉拷一锟斤拷锟街凤拷锟斤拷
haystack锟节达拷锟街凤拷锟斤拷锟叫斤拷锟叫诧拷锟揭★拷
needle
锟斤拷锟� needle锟斤拷锟斤拷一锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷转锟斤拷为锟斤拷锟酵诧拷锟斤拷锟斤拷为锟街凤拷锟斤拷顺锟斤拷值锟斤拷
offset锟斤拷锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟解长锟饺碉拷锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷锟铰诧拷锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷尾锟斤拷锟斤拷始锟侥硷拷锟斤拷位锟矫达拷锟斤拷锟斤拷锟斤拷
锟斤拷锟斤拷 needle 锟斤拷锟节碉拷位锟矫★拷锟斤拷锟矫伙拷锟斤拷业锟斤拷锟斤拷锟斤拷锟� FALSE锟斤拷
Also note that string positions start at 0, and not 1.
Returns FALSE if the needle was not found.
锟剿猴拷锟斤拷锟斤拷锟杰凤拷锟截诧拷锟斤拷值
FALSE锟斤拷锟斤拷也锟斤拷锟杰凤拷锟截碉拷同锟斤拷 FALSE 锟侥非诧拷锟斤拷值锟斤拷锟斤拷锟侥讹拷 锟斤拷锟斤拷锟斤拷锟斤拷锟铰斤拷锟皆伙拷取锟斤拷锟斤拷锟斤拷息锟斤拷应使锟斤拷
===
锟斤拷锟斤拷锟�锟斤拷锟斤拷锟皆此猴拷锟斤拷锟侥凤拷锟斤拷值锟斤拷
| 锟芥本 | 说锟斤拷 |
|---|---|
| 5.0.0 |
锟斤拷锟斤拷 needle 锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟街凤拷锟斤拷锟街凤拷锟斤拷锟斤拷
|
| 5.0.0 |
锟斤拷锟斤拷 offset 锟斤拷锟斤拷锟斤拷
|
Example #1 锟斤拷锟斤拷执锟斤拷欠锟斤拷锟斤拷
锟斤拷锟斤拷锟阶斤拷"锟斤拷位锟斤拷 0 锟斤拷锟揭碉拷"锟斤拷"未锟斤拷锟斤拷锟街凤拷锟斤拷"锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角硷拷锟斤拷锟斤拷锟侥办法锟斤拷
<?php
$pos = strrpos($mystring, "b");
if ($pos === false) { // 注锟斤拷: 锟斤拷锟斤拷锟饺猴拷
// 未锟斤拷锟斤拷...
}
?>
Example #2 使锟斤拷偏锟斤拷位锟矫斤拷锟叫诧拷锟斤拷
<?php
$foo = "0123456789a123456789b123456789c";
var_dump(strrpos($foo, '7', -5)); // 锟斤拷尾锟斤拷锟斤拷 5 锟斤拷位锟矫匡拷始锟斤拷锟斤拷
// 锟斤拷锟�: int(17)
var_dump(strrpos($foo, '7', 20)); // 锟接碉拷 20 锟斤拷位锟矫匡拷始锟斤拷锟斤拷
// 锟斤拷锟�: int(27)
var_dump(strrpos($foo, '7', 28)); // 锟斤拷锟�: bool(false)
?>