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php±í´ïʽ֮explode() ·Ö¸î×Ö·û´®

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Description
array explode
( string separator, string string [, int limit])phpma.com
Returns an array of strings, each of which is a substring of string
formed by splitting it on boundaries formed by the string separator
. If limit
is set, the returned array will contain a maximum of limit
elements with the last element containing the rest of string
.
If separator
is an empty string (""), explode()
will return FALSE
. If separator
contains a value that is not contained in string
, then explode()
will return an array containing string
.
If the limit
parameter is negative, all components except the last limit
are returned. This feature was added in PHP
5.1.0
.
Although implode()
can, for historical reasons, accept its parameters in either order, explode()
cannot. You must ensure that the separator
argument comes before the string
argument.
×¢:
The limit
parameter was added in PHP
4.0.1

phpma.com
Àý×Ó
1
.
explode()
examples
<?php
// Example
1
$pizza 
=
"piece
1
piece
2
piece
3
piece
4
piece
5
piece
6
"
;
$pieces
=
explode
(
" "
,
$pizza
);
echo
$pieces
[
0
];
// piece
1
echo
$pieces
[
1
];
// piece
2
// Example
2
$data
=
"foo:*:
1023
:
1000
::/home/foo:/bin/sh"
;
list(
$user
,
$pass
,
$uid
,
$gid
,
$gecos
,
$home
,
$shell
) =
explode
(
":"
,
$data
);
echo
$user
;
// foo
echo
$pass
;
// *
?>

Àý×Ó
2
.
limit
parameter examples
phpma.com
<?php
$str
=
'one|two|three|four'
;
// positive limit
print_r
(
explode
(
'|'
,
$str
,
2
));
// negative limit
print_r
(
explode
(
'|'
,
$str
, -
1
));
?>

The above example will output:
Array
(
[
0
] => one
[
1
] => two|three|four
)
Array
(
[
0
] => one
[
1


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