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删除数组元素实用的PHP数组函数_PHP

WBOY
WBOYOriginal
2016-06-01 12:24:39830browse

/**
* 从数组中删除空白的元素(包括只有空白字符的元素)
*
* @param array $arr
* @param boolean $trim
*/
复制代码 代码如下:
function array_remove_empty(& $arr, $trim = true)
{
foreach ($arr as $key => $value) {
if (is_array($value)) {
array_remove_empty($arr[$key]);
} else {
$value = trim($value);
if ($value == '') {
unset($arr[$key]);
} elseif ($trim) {
$arr[$key] = $value;
}
}
}
}






/**
* 将一个二维数组转换为 hashmap
*
* 如果省略 $valueField 参数,则转换结果每一项为包含该项所有数据的数组。
*
* @param array $arr
* @param string $keyField
* @param string $valueField
*
* @return array
*/
复制代码 代码如下:
function array_to_hashmap(& $arr, $keyField, $valueField = null)
{
$ret = array();
if($valueField) {
foreach ($arr as $row) {
$ret[$row[$keyField]] = $row[$valueField];
}
} else {
foreach($arr as $row) {
$ret[$row[$keyField]] = $row;
}
}
return $ret;
}

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