Combining vertical and horizontal lines, an upgraded version of the record set super processing function array_column is implemented-PHP Tutorial-php.cn

Combining vertical and horizontal lines, an upgraded version of the record set super processing function array_column is implemented

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Release： 2016-07-25 08:48:35

Original

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Highlights: Simplified operations, array_walk batch processing, references, and low internal consumption.

Application scenarios: Mainly used to process record sets (two-dimensional arrays)
1. Integrate result sets (one-dimensional arrays, such as ids: [1,3,4,5], list of winning user names: ['Xiong Ming' ,'lijia','Erlangshen'])
2. Combined key-value pair (one-dimensional array, such as tag: array('mysql'=>'url1','php'=>'url2'])
3. Cache File data (id=>info)

Note: PHP5.5 version is a built-in function, please pay attention to naming conflicts before use

From (EQPHP tool class): https://github.com/eqphp/framework/ blob/master/www/class/fun.php

Demo works: http://www.eqphp.com/blog/list/

//Processing record sets (built-in in php5.5)
static function array_column($data,$key='id',$column=null){
$buffer=null;
if ($column) {
//k=>v
if (strpos($column,',') === false) {
foreach ($data as $value) {
$buffer[$value[$key]]=$ value[$column];
}
return $buffer;
}
//k=arr
$field=explode(',',$column);
foreach ($data as $value) {
$id= $value[$key];
array_walk($value,function ($v,$k) use (&$value,$field){
if (!in_array($k,$field)) unset($value[$ k]);
});
$buffer[$id]=$value;
}
return $buffer;
}
//id_arr
foreach ($data as $value) {
$buffer[]=$ value[$key];
}
return $buffer;
}
//Usage demo:
//Original record set:
$data=array(
array('id'=>1,'name '=>'dubox','age'=>25,'girlfriend'=>'Soda Green'),
array('id'=>4,'name'=>'Xiao Chunzi',' age'=>21,'girlfriend'=>'don't know'),
array('id'=>9,'name'=>'idiot','age'=>71,'girlfriend '=>'widow'),
);
$ids=array_column($data,'id');
//out: array(1,4,9);
$info=array_column($data ,'name','girlfriend');
//out: array('dubox'=>'Soda Green','Xiao Chunzi'=>'I don't know','idiot'=>'Widow');
$cache=array_column($data,'id','name,age,girlfriend');
//out: array(
1=>array('name'=>'dubox','age' =>25,'girlfriend'=>'Soda Green'),
4=>array('name'=>'Xiao Chunzi','age'=>21,'girlfriend'=>'No know'),
9=>array('name'=>'idiot','age'=>71,'girlfriend'=>'widow'),
);

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