smarty 的 modifier插件
1、截取gb2312字符串：
代码
1
function
smarty_modifier_truncate_cn_gb2312(
$string
,
$length
,
$etc
=
'
...
'
)
2
{
3
$result
=
''
;
4
$string
=
html_entity_decode
(
trim
(
strip_tags
(
$string
))
,
ENT_QUOTES
,
'
GB2312
'
);
5
$strlen
=
strlen
(
$string
);
6
7
for
(
$i
=
0
; ((
$i
<
$strlen
)
&&
(
$length
>
0
));
$i
++
)
8
{
9
if
(
ord
(
substr
(
$string
,
$i
,
1
))
>
128
)
10
{
11
if
(
$length
<
1.0
)
12
{
13
break
;
14
}
15
$result
.=
substr
(
$string
,
$i
,
2
);
16
$length
-=
1.0
;
17
$i
++
;
18
}
19
else
20
{
21
$result
.=
substr
(
$string
,
$i
,
1
);
22
$length
-=
0.5
;
23
}
24
}
25
26
$result
=
htmlspecialchars
(
$result
,
ENT_QUOTES
,
'
GB2312
'
);
27
28
if
(
$i
<
$strlen
)
29
{
30
$result
.=
$etc
;
31
}
32
33
return
$result
;
34
}
2、截取UTF-8字符串：
代码
1
function
smarty_modifier_truncate_cn_utf8(
$string
,
$length
,
$etc
=
'
...
'
)
2
{
3
$result
=
''
;
4
$string
=
html_entity_decode
(
trim
(
strip_tags
(
$string
))
,
ENT_QUOTES
,
'
UTF-8
'
);
5
$strlen
=
strlen
(
$string
);
6
7
for
(
$i
=
0
; ((
$i
<
$strlen
)
&&
(
$length
>
0
));
$i
++
)
8
{
9
if
(
$number
=
strpos
(
str_pad
(
decbin
(
ord
(
substr
(
$string
,
$i
,
1
)))
,
8
,
'
0
'
,
STR_PAD_LEFT)
,
'
0
'
))
10
{
11
if
(
$length
<
1.0
)
12
{
13
break
;
14
}
15
16
$result
.=
substr
(
$string
,
$i
,
$number
);
17
$length
-=
1.0
;
18
$i
+=
$number
-
1
;
19
}
20
else
21
{
22
$result
.=
substr
(
$string
,
$i
,
1
);
23
$length
-=
0.5
;
24
}
25
}
26
27
$result
=
htmlspecialchars
(
$result
,
ENT_QUOTES
,
'
UTF-8
'
);
28
29
if
(
$i
<
$strlen
)
30
{
31
$result
.=
$etc
;
32
}
33
34
return
$result
;
35
}