都有相应的函数
例:
<?php
$aa = array( '0' => 1,
'1' => 3,
'2' => 5,
'3' => 7,
'4' => 9,
'5' => 12);
$bb = array( '0' => 1,
'1' => 2,
'2' => 3,
'3' => 4,
'4' => 5,
'5' => 6,
'6' => 7,
'7' => 8,
'8' => 9,
'9' => 0);
echo "<br>交集<br>";
print_r(array_intersect($aa,$bb));
echo "<br>差集<br>";
print_r(array_diff($aa,$bb));
echo "<br>并集<br>";
print_r(array_merge_recursive ($aa,$bb));?>
例:
<?php
$aa = array( '0' => 1,
'1' => 3,
'2' => 5,
'3' => 7,
'4' => 9,
'5' => 12);
$bb = array( '0' => 1,
'1' => 2,
'2' => 3,
'3' => 4,
'4' => 5,
'5' => 6,
'6' => 7,
'7' => 8,
'8' => 9,
'9' => 0);
echo "<br>交集<br>";
print_r(array_intersect($aa,$bb));
echo "<br>差集<br>";
print_r(array_diff($aa,$bb));
echo "<br>并集<br>";
print_r(array_merge_recursive ($aa,$bb));?>
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http://expert.csdn.net/Expert/topic/1511/1511528.xml?temp=.6481134
里面的问题