这篇文章主要介绍了自己写的兼容低于PHP 5.5版本的array_column()函数,array_column是PHP 5.5新增函数,有时在低版本中也可能要用到,需要的朋友可以参考下
array_column 用于获取二维数组中的元素(PHP 5.5新增函数),但我们有时候需要在低版本的PHP环境中使用…
if( ! function_exists('array_column')) { function array_column($input, $columnKey, $indexKey = NULL) { $columnKeyIsNumber = (is_numeric($columnKey)) ? TRUE : FALSE; $indexKeyIsNull = (is_null($indexKey)) ? TRUE : FALSE; $indexKeyIsNumber = (is_numeric($indexKey)) ? TRUE : FALSE; $result = array(); foreach ((array)$input AS $key => $row) { if ($columnKeyIsNumber) { $tmp = array_slice($row, $columnKey, 1); $tmp = (is_array($tmp) && !empty($tmp)) ? current($tmp) : NULL; } else { $tmp = isset($row[$columnKey]) ? $row[$columnKey] : NULL; } if ( ! $indexKeyIsNull) { if ($indexKeyIsNumber) { $key = array_slice($row, $indexKey, 1); $key = (is_array($key) && ! empty($key)) ? current($key) : NULL; $key = is_null($key) ? 0 : $key; } else { $key = isset($row[$indexKey]) ? $row[$indexKey] : 0; } } $result[$key] = $tmp; } return $result; } }
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