php中計算二維數組中某一元素之和

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標籤:mini   二維數組   function   number   url   item   php   cti   line   

[0] => array(5) {      ["id"] => string(2) "11"      ["name"] => string(5) "1.jpg"      ["suffix"] => string(3) "jpg"      ["url"] => string(29) "./Uploads/1/5292f55d208e8.jpg"      ["size"] => string(6) "715895"    }    [1] => array(5) {      ["id"] => string(2) "12"      ["name"] => string(22) "minisite資料庫.docx"      ["suffix"] => string(4) "docx"      ["url"] => string(30) "./Uploads/1/5292f5606a52c.docx"      ["size"] => string(5) "16667"    }

我要計算size的和

(1)

echo array_sum ( array_map (create_function( ‘$val‘ , ‘return $val["size"];‘ ), $arr )); 或者 echo array_sum ( array_map ( function ( $val ){ return $val [ ‘size‘ ];}, $arr ));(2) $sum = 0; foreach ( $arr as $item ){    $sum += (int) $item [ ‘size‘ ]; }  

php中計算二維數組中某一元素之和

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