例子 1.
key()
例子
<?php
$array
= array(
'fruit1'
=>
'apple'
,
'fruit2'
=>
'orange'
,
'fruit3'
=>
'grape'
,
'fruit4'
=>
'apple'
,
'fruit5'
=>
'apple'
);
// this cycle echoes all associative array
// key where value equals "apple"
while (
$fruit_name
=
current
(
$array
)) {
if (
$fruit_name
==
'apple'
) {
echo
key
(
$array
).
'<br />'
;
}
next
(
$array
);
}
?>
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