php页面中,有二维数组,数组中有一值num,
现已知num=7.0 需把小于num并是最大值 的那一列值输出,也就是输出 num=6.0的那个数组,
$arr = array(
array( 'id' => 5, 'num' => '5.0'),
array( 'id' => 3, 'num' => '6.0 ),
array( 'id' => 6, 'num' => '7.0 ),
);
如何实现,thanks.
现已知num=7.0 需把小于num并是最大值 的那一列值输出,也就是输出 num=6.0的那个数组,
$arr = array(
array( 'id' => 5, 'num' => '5.0'),
array( 'id' => 3, 'num' => '6.0 ),
array( 'id' => 6, 'num' => '7.0 ),
);
如何实现,thanks.
array( 'id' => 5, 'num' => '5.0'),
array( 'id' => 3, 'num' => '6.0' ),
array( 'id' => 6, 'num' => '7.0' ),
);
$num = 7.0;
$max = 0.0;
foreach($arr as $v){if($v['num'] < $num && $v['num'] > $max)$a = $v;}print_r($a);
<?php
$arr = array(
array( 'id' => 5, 'num' => '5.0'),
array( 'id' => 3, 'num' => '6.0' ),
array( 'id' => 6, 'num' => '7.0' ),
);
$m=7.0;
for ($i=0;$i<count($arr);$i++){
if($arr[$i]['num']<$m){
$data[]=$arr[$i]['num'];
$result[]=$arr[$i];
}
}
$rt=max($data);
foreach ($result as $v){
if($v['num']===$rt){
print_r($v);
}
}?>
还有没有好方法呀,