{"id":163,"date":"2017-09-27T16:24:03","date_gmt":"2017-09-27T16:24:03","guid":{"rendered":"http:\/\/td_uid_83_59cbd0a341d91"},"modified":"2018-07-09T11:38:53","modified_gmt":"2018-07-09T04:38:53","slug":"15-ham-ve-mang-thuong-su-dung-nhat-trong-php","status":"publish","type":"post","link":"https:\/\/thietkewebdalat.net\/blog\/15-ham-ve-mang-thuong-su-dung-nhat-trong-php\/","title":{"rendered":"17 h\u00e0m v\u1ec1 m\u1ea3ng th\u01b0\u1eddng hay s\u1eed d\u1ee5ng nh\u1ea5t trong PHP"},"content":{"rendered":"

H\u00f4m nay m\u00ecnh s\u1ebd gi\u1edbi thi\u1ec7u 17 c\u00e1ch s\u1eed d\u1ee5ng m\u1ea3ng trong php<\/p>\n

L\u01b0u \u00fd:trong b\u00e0i n\u00e0y m\u00ecnh s\u1ebd s\u1eed d\u1ee5ng [] cho phi\u00ean b\u1ea3n php 5.4 c\u00f2n b\u1ea1n s\u1eed d\u1ee5ng c\u00e1c phi\u00ean b\u1ea3n 5.3 tr\u1edf v\u1ec1 tr\u01b0\u1edbc th\u00ec s\u1eed d\u1ee5ng array() nh\u00e9.<\/p>\n

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    1. \u0110\u1ebfm s\u1ed1 l\u01b0\u1ee3ng m\u1ea3ng trong php ta s\u1eed d\u1ee5ng h\u00e0m COUNT()<\/span><\/strong><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
      $vehicle<\/span> =<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>,<\/span> 'Truck'<\/span>,<\/span> 'Bus'<\/span>]<\/span>;<\/span> \/\/ \u0111\u1ecbnh ngh\u0129a m\u1ea3ng<\/span>\r\n$vehicle<\/span> =<\/span> mysqli_fetch_all<\/span>(<\/span>$query<\/span>)<\/span>;<\/span> \/\/ ho\u1eb7c l\u1ea5y d\u1eef li\u1ec7u t\u1eeb database<\/span>\r\necho<\/span> 'Found '<\/span> .<\/span>  count<\/span>(<\/span>$vehicle<\/span>)<\/span><\/span><\/strong> .<\/span> ' vehicle data'<\/span>;<\/span><\/code><\/pre>\n
      2.\u00a0K\u1ebft h\u1ee3p c\u00e1c gi\u00e1 tr\u1ecb m\u1ea3ng th\u00e0nh m\u1ed9t chu\u1ed7i ta s\u1eed d\u1ee5ng h\u00e0m JOIN<\/span><\/strong><\/p>\n
      <?php<\/span>\r\n$vehicle<\/span> \t=<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>]<\/span>;\/\/khoi t\u1ea1o m\u1ea3ng<\/span>\r\n$sql<\/span> \t\t=<\/span> 'INSERT INTO vehicle VALUES (\"'<\/span> .<\/span> join<\/span>(<\/span>'\",\"'<\/span>,<\/span> $vehicle<\/span>)<\/span> .<\/span> '\")'<\/span>;<\/span>\r\necho<\/span> $sql<\/span>;<\/span>\r\n\/\/ k\u1ebft qu\u1ea3: INSERT INTO vehicle VALUES (\"Car\",\"Motorcycle\",\"Bicycle\")<\/span><\/code><\/pre>\n
      3.\u00a0Thay \u0111\u1ed5i t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a m\u1ea3ng:<\/p>\n
      \u0110\u1ec3 thay \u0111\u1ed5i t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a m\u1ea3ng, s\u1eed d\u1ee5ng h\u00e0m array_map<\/span><\/strong>, h\u00e0m n\u00e0y s\u1ebd g\u1ecdi m\u1ed9t h\u00e0m kh\u00e1c s\u1ebd thao t\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a m\u1ea3ng, h\u00e0m n\u00e0y c\u00f3 th\u1ec3 l\u00e0 h\u00e0m do PHP (h\u00e0m d\u1ef1ng s\u1eb5n) ho\u1eb7c h\u00e0m ri\u00eang c\u1ee7a ch\u00fang ta cung c\u1ea5p (ng\u01b0\u1eddi d\u00f9ng \u0111\u1ecbnh ngh\u0129a) ch\u1ee9c n\u0103ng)<\/p>\n
      V\u00ed d\u1ee5: x\u00f3a d\u1ea5u c\u00e1ch \u1edf \u0111\u1ea7u v\u00e0 cu\u1ed1i m\u1ed7i gi\u00e1 tr\u1ecb c\u1ee7a m\u1ea3ng (lo\u1ea1i b\u1ecf d\u1ea5u c\u00e1ch ph\u00eda tr\u01b0\u1edbc v\u00e0 cu\u1ed1i):<\/p>\n
      <?php<\/span>\r\n$vehicle<\/span> \t=<\/span> [<\/span>'Car '<\/span>,<\/span> ' Motorcycle'<\/span>,<\/span> ' Bicycle '<\/span>]<\/span>;<\/span>\r\n$trimmed<\/span> =<\/span> array_map<\/span>(<\/span>'trim'<\/span>,<\/span> $vehicle<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$vehicle<\/span>)<\/span>;<\/span> print_r<\/span>(<\/span>$trimmed<\/span>)<\/span>;<\/span>\r\n\/* Result:\r\nArray\r\n(\r\n    [0] => Car \r\n    [1] =>  Motorcycle\r\n    [2] =>  Bicycle \r\n)\r\nArray\r\n(\r\n    [0] => Car\r\n    [1] => Motorcycle\r\n    [2] => Bicycle\r\n)*\/<\/span><\/code><\/pre>\n
      Trong c\u1ea3 hai v\u00ed d\u1ee5 tr\u00ean, ch\u00fang ta s\u1eed d\u1ee5ng h\u00e0m d\u1ef1ng s\u1eb5n: trim (trim ($ value)). M\u1ed9t v\u00ed d\u1ee5 kh\u00e1c l\u00e0 thay \u0111\u1ed5i t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a m\u1ea3ng th\u00e0nh ch\u1eef hoa s\u1eed d\u1ee5ng h\u00e0m do ng\u01b0\u1eddi d\u00f9ng \u0111\u1ecbnh ngh\u0129a:<\/p>\n
      <?php<\/span>\r\nfunction<\/span> toUpper<\/span>(<\/span>$array_value<\/span>)<\/span> {<\/span>\r\n\treturn<\/span> strtoupper<\/span>(<\/span>$array_value<\/span>)<\/span>;<\/span>\r\n}<\/span>\r\n$vehicle<\/span> \t=<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>]<\/span>;<\/span>\r\n$upper<\/span> \t\t=<\/span> array_map<\/span>(<\/span>'toUpper'<\/span>,<\/span> $vehicle<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$upper<\/span>)<\/span>;<\/span>\r\n\/* k\u1ebft qu\u1ea3:\r\nArray\r\n(\r\n    [0] => CAR \r\n    [1] => MOTORCYCLE\r\n    [2] => BICYCLE \r\n)*\/<\/span><\/code><\/pre>\n
      4.\u00a0Ki\u1ec3m tra xem m\u1ed9t m\u1ea3ng c\u00f3 ch\u1ee9a m\u1ed9t gi\u00e1 tr\u1ecb nh\u1ea5t \u0111\u1ecbnh hay kh\u00f4ng ta s\u1eed d\u1ee5ng h\u00e0m in_array<\/span><\/strong><\/p>\n
      <?php<\/span>\r\n$vehicle<\/span> =<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>,<\/span> 'Truck'<\/span>,<\/span> 'Bus'<\/span>]<\/span>;<\/span>\r\nif<\/span> (<\/span>in_array<\/span>(<\/span>'Motorcycle'<\/span>,<\/span> $vehicle<\/span>)<\/span>)<\/span>\r\n{<\/span>\r\n\techo<\/span> 'T\u1ed3n t\u1ea1i'<\/span>;<\/span>\r\n}<\/span><\/code><\/pre>\n
      5.\u00a0Ki\u1ec3m tra xem m\u1ed9t m\u1ea3ng c\u00f3 ch\u1ee9a m\u1ed9t kh\u00f3a nh\u1ea5t \u0111\u1ecbnh hay kh\u00f4ng ta d\u00f9ng h\u00e0m\u00a0\u00a0array_key_exists<\/span><\/strong> ho\u1eb7c\u00a0key_exists<\/span><\/strong><\/p>\n
      <?php<\/span>\r\n$car<\/span> =<\/span> [<\/span>'merk'<\/span> =<\/span>><\/span> 'Toyota'<\/span>,<\/span> 'type'<\/span> =<\/span>><\/span> 'Vios'<\/span>,<\/span> 'year'<\/span> =<\/span>><\/span> 2016<\/span>]<\/span>;<\/span>\r\nif<\/span> (<\/span>key_exists<\/span>(<\/span>'type'<\/span>,<\/span> $car<\/span>)<\/span>)<\/span>\r\n{<\/span>\r\n\techo<\/span> $car<\/span>[<\/span>'type'<\/span>]<\/span>;<\/span> \/\/ Vios<\/span>\r\n}<\/span><\/code><\/pre>\n
      6.\u00a0Truy xu\u1ea5t t\u1ea5t c\u1ea3 c\u00e1c kh\u00f3a c\u1ee7a m\u1ed9t m\u1ea3ng tao d\u00f9ng h\u00e0m array_keys<\/span><\/strong><\/p>\n
      $car<\/span> \t=<\/span> [<\/span>'merk'<\/span> =<\/span>><\/span> 'Toyota'<\/span>,<\/span> 'type'<\/span> =<\/span>><\/span> 'Vios'<\/span>,<\/span> 'year'<\/span> =<\/span>><\/span> 2016<\/span>]<\/span>;<\/span>\r\n$keys<\/span> \t=<\/span> array_keys<\/span>(<\/span>$car<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$keys<\/span>)<\/span>;<\/span>\r\n\/* Result:\r\nArray\r\n(\r\n    [0] => merk\r\n    [1] => type\r\n    [2] => year\r\n) *\/<\/span><\/code><\/pre>\n
      7.\u00a0L\u1ea5y t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a m\u1ed9t m\u1ea3ng ta s\u1eed d\u1ee5ng h\u00e0m array_values<\/span><\/strong><\/p>\n
      <?php<\/span>\r\n$car<\/span> \t=<\/span> [<\/span>'merk'<\/span> =<\/span>><\/span> 'Toyota'<\/span>,<\/span> 'type'<\/span> =<\/span>><\/span> 'Vios'<\/span>,<\/span> 'year'<\/span> =<\/span>><\/span> 2016<\/span>]<\/span>;<\/span>\r\n$values<\/span> =<\/span> array_values<\/span>(<\/span>$car<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$values<\/span>)<\/span>;<\/span>\r\n\/* Result:\r\nArray\r\n(\r\n    [0] => Toyota\r\n    [1] => Vios\r\n    [2] => 2016\r\n)*\/<\/span><\/code><\/pre>\n
      8.\u00a0S\u1eafp x\u1ebfp c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a m\u1ed9t m\u1ea3ng ta s\u1eed d\u1ee5ng asort(s\u1eafp x\u1ebfp theo a->b)<\/span><\/strong> v\u00e0 arsort<\/strong><\/span><\/p>\n
      <?php<\/span>\r\n$vehicle<\/span> =<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>,<\/span> 'Truck'<\/span>,<\/span> 'Bus'<\/span>]<\/span>;<\/span>\r\nasort<\/span>(<\/span>$vehicle<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$vehicle<\/span>)<\/span>;<\/span>\r\n\/* Result:\r\nArray\r\n(\r\n    [4] => Bicycle\r\n    [0] => Bus\r\n    [1] => Car\r\n    [2] => Motorcycle\r\n    [3] => Truck\r\n)*\/<\/span><\/code><\/pre>\n
      <?php<\/span>\r\n$value<\/span> \t\t=<\/span> [<\/span>90<\/span>,<\/span> 70<\/span>,<\/span> 85<\/span>,<\/span> 65<\/span>]<\/span>;<\/span>\r\nasort<\/span>(<\/span>$value<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$value<\/span>)<\/span>;<\/span>\r\n\r\n\/* Result\r\nArray\r\n(\r\n    [3] => 65\r\n    [1] => 70\r\n    [2] => 85\r\n    [0] => 90\r\n)*\/<\/span><\/code><\/pre>\n
      9.\u00a0S\u1eafp x\u1ebfp c\u00e1c kh\u00f3a c\u1ee7a m\u1ed9t m\u1ea3ng ta s\u1eed d\u1ee5ng ksort<\/span><\/strong> v\u00e0 krsort<\/span><\/strong>
      \n\u0110\u1ec3 s\u1eafp x\u1ebfp c\u00e1c kh\u00f3a c\u1ee7a m\u1ed9t m\u1ea3ng, ch\u00fang ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng hai lo\u1ea1i h\u00e0m, \u0111\u00f3 l\u00e0 ksort v\u00e0 krsort.<\/p>\n
      ksort \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1eafp x\u1ebfp theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n (t\u1eeb nh\u1ecf nh\u1ea5t \u0111\u1ebfn l\u1edbn nh\u1ea5t), trong khi krsort \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1eafp x\u1ebfp t\u1eeb l\u1edbn nh\u1ea5t \u0111\u1ebfn nh\u1ecf nh\u1ea5t (th\u1ee9 t\u1ef1 gi\u1ea3m d\u1ea7n)<\/p>\n
      <?php<\/span>\r\n$car<\/span> =<\/span> [<\/span>'merk'<\/span> =<\/span>><\/span> 'Toyota'<\/span>,<\/span> 'type'<\/span> =<\/span>><\/span> 'Vios'<\/span>,<\/span> 'year'<\/span> =<\/span>><\/span> 2016<\/span>]<\/span>;<\/span>\r\nkrsort<\/span>(<\/span>$car<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$car<\/span>)<\/span>;<\/span>\r\n\r\n\/* Result\r\nArray\r\n(\r\n    [year] => 2016\r\n    [type] => Vios\r\n    [merk] => Toyota\r\n)*\/<\/span><\/code><\/pre>\n
      10.\u00a0K\u1ebft h\u1ee3p c\u00e1c m\u1ea3ng trong PHP<\/p>\n
      C\u00f3 hai c\u00e1ch \u0111\u1ec3 k\u1ebft h\u1ee3p c\u00e1c m\u1ea3ng trong PHP: s\u1eed d\u1ee5ng h\u00e0m array_merge<\/span><\/strong> ho\u1eb7c ch\u1ec9 c\u1ea7n s\u1eed d\u1ee5ng d\u1ea5u c\u1ed9ng (+)<\/span><\/strong>, h\u00e0m n\u00e0y r\u1ea5t h\u1eefu \u00edch khi ch\u00fang ta mu\u1ed1n k\u1ebft h\u1ee3p hai k\u1ebft qu\u1ea3 m\u1ea3ng c\u1ee7a truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/p>\n
      <?php<\/span>\r\n$vehicle<\/span> \t\t=<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>,<\/span> 'Truck'<\/span>,<\/span> 'Bus'<\/span>]<\/span>;<\/span>\r\n$car<\/span> \t\t\t=<\/span> [<\/span>'merk'<\/span> =<\/span>><\/span> 'Toyota'<\/span>,<\/span> 'type'<\/span> =<\/span>><\/span> 'Vios'<\/span>,<\/span> 'year'<\/span> =<\/span>><\/span> 2016<\/span>]<\/span>;<\/span>\r\n$merge<\/span>\t\t\t=<\/span> array_merge (<\/span>$vehicle<\/span>,<\/span> $car<\/span>)<\/span>;<\/span>\r\n\/\/ or $merge \t= $vehicle + $car;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$merge<\/span>)<\/span>;<\/span>\r\n\/* Result:\r\nArray\r\n(\r\n    [0] => Car\r\n    [1] => Motorcycle\r\n    [2] => Bicycle\r\n    [3] => Truck\r\n    [4] => Bus\r\n    [merk] => Toyota\r\n    [type] => Vios\r\n    [year] => 2016\r\n)*\/<\/span><\/code><\/pre>\n
      11.T\u00ecm ki\u1ebfm kh\u00f3a gi\u00e1 tr\u1ecb c\u1ee7a m\u1ed9t m\u1ea3ng trong PHP ta s\u1eed d\u1ee5ng t\u1eeb kh\u00f3a array_search<\/span><\/strong><\/p>\n
      <?php<\/span>\r\n$vehicle<\/span> \t=<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>,<\/span> 'Truck'<\/span>,<\/span> 'Bus'<\/span>]<\/span>;<\/span>\r\n$car<\/span> \t\t=<\/span> [<\/span>'merk'<\/span> =<\/span>><\/span> 'Toyota'<\/span>,<\/span> 'type'<\/span> =<\/span>><\/span> 'Vios'<\/span>,<\/span> 'year'<\/span> =<\/span>><\/span> 2016<\/span>]<\/span>;<\/span>\r\n$key<\/span> =<\/span> array_search<\/span>(<\/span>'Vios'<\/span>,<\/span> $car<\/span>)<\/span>;<\/span> \/\/ type<\/span>\r\n$key<\/span> =<\/span> array_search<\/span>(<\/span>'Bicycle'<\/span>,<\/span> $vehicle<\/span>)<\/span>;<\/span> \/\/ 2<\/span><\/code><\/pre>\n
      B\u1ea1n c\u00f3 th\u1ec3 x\u00f3a c\u00e1c ph\u1ea7n t\u1eed trong m\u1ea3ng b\u1ea1n d\u00f9ng h\u00e0m Unset<\/span><\/strong><\/p>\n
      <?php<\/span>\r\n$vehicle<\/span> =<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>,<\/span> 'Truck'<\/span>,<\/span> 'Bus'<\/span>]<\/span>;<\/span>\r\n$key<\/span> \t =<\/span> array_search<\/span>(<\/span>'Bicycle'<\/span>,<\/span> $vehicle<\/span>)<\/span>;<\/span> \/\/ 2<\/span>\r\n\/\/ Deleting Bicycle<\/span>\r\nunset<\/span>(<\/span>$vehicle<\/span>[<\/span>$key<\/span>]<\/span>)<\/span>;<\/span><\/code><\/pre>\n
      12.\u00a0X\u00f3a ph\u1ea7n t\u1eed \u0111\u1ea7u ti\u00ean c\u1ee7a m\u1ed9t m\u1ea3ng trong PHP d\u00f9ng h\u00e0m array_shift<\/span><\/strong><\/p>\n
      <?php<\/span>\r\n$car<\/span> \t=<\/span> [<\/span>'merk'<\/span> =<\/span>><\/span> 'Toyota'<\/span>,<\/span> 'type'<\/span> =<\/span>><\/span> 'Vios'<\/span>,<\/span> 'year'<\/span> =<\/span>><\/span> 2016<\/span>]<\/span>;<\/span>\r\n$key<\/span> \t=<\/span> array_shift<\/span>(<\/span>$car<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$car<\/span>)<\/span>;<\/span>\r\n\/* Result:\r\nArray\r\n(\r\n    [type] => Vios\r\n    [year] => 2016\r\n) *\/<\/span><\/code><\/pre>\n
      13. Th\u00eam ph\u1ea7n t\u1eed v\u00e0o \u0111\u1ea7u m\u1ea3ng d\u00f9ng h\u00e0m\u00a0array_unshift\u00a0<\/span><\/strong><\/p>\n
      \/\/ Indexed Array<\/span>\r\n$vehicle<\/span> \t\t=<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>]<\/span>;<\/span>\r\narray_unshift (<\/span>$vehicle<\/span>,<\/span> 'Truck'<\/span>,<\/span>  'Bus'<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$vehicle<\/span>)<\/span>;<\/span>\r\n\/* Result:\r\nArray\r\n(\r\n    [0] => Truck\r\n    [1] => Bus\r\n    [2] => Car\r\n    [3] => Motorcycle\r\n    [4] => Bicycle\r\n)*\/<\/span>\r\n\r\n\/\/ Associative array<\/span>\r\n$car<\/span> \t\t=<\/span> [<\/span>'merk'<\/span> =<\/span>><\/span> 'Toyota'<\/span>,<\/span> 'type'<\/span> =<\/span>><\/span> 'Vios'<\/span>,<\/span> 'year'<\/span> =<\/span>><\/span> 2016<\/span>]<\/span>;<\/span>\r\narray_unshift (<\/span>$car<\/span>,<\/span> 'Sedan'<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$car<\/span>)<\/span>;<\/span>\r\n\/<\/span>*<\/span> Result\r\nArray<\/span>\r\n(<\/span>\r\n    [<\/span>0<\/span>]<\/span> =<\/span>><\/span> Sedan\r\n    [<\/span>merk]<\/span> =<\/span>><\/span> Toyota\r\n    [<\/span>type]<\/span> =<\/span>><\/span> Vios\r\n    [<\/span>year]<\/span> =<\/span>><\/span> 2016<\/span>\r\n)<\/span><\/code><\/pre>\n
      14.\u00a0Th\u00eam ph\u1ea7n t\u1eed v\u00e0o cu\u1ed1i m\u1ea3ng<\/p>\n
      <?php<\/span>\r\n$vehicle<\/span> \t=<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>]<\/span>;<\/span>\r\narray_push (<\/span>$vehicle<\/span>,<\/span> 'Truck'<\/span>,<\/span> 'Bus'<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$vehicle<\/span>)<\/span>;<\/span>\r\n\/* Result:\r\nArray\r\n(\r\n    [0] => Car\r\n    [1] => Motorcycle\r\n    [2] => Bicycle\r\n    [3] => Truck\r\n    [4] => Bus\r\n)*\/<\/span>\r\n\r\n$car<\/span> =<\/span> [<\/span>'merk'<\/span> =<\/span>><\/span> 'Toyota'<\/span>,<\/span> 'type'<\/span> =<\/span>><\/span> 'Vios'<\/span>,<\/span> 'year'<\/span> =<\/span>><\/span> 2016<\/span>]<\/span>;<\/span>\r\narray_push (<\/span>$car<\/span>,<\/span> 'Sedan'<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$car<\/span>)<\/span>;<\/span>\r\n\/* Result\r\nArray\r\n(\r\n    [merk] => Toyota\r\n    [type] => Vios\r\n    [year] => 2016\r\n    [0] => Sedan\r\n)\r\n*\/<\/span><\/code><\/pre>\n
      15. X\u00f3a ph\u1ea7n t\u1eed cu\u1ed1i c\u00f9ng c\u1ee7a m\u1ea3ng d\u00f9ng h\u00e0m\u00a0array_pop\u00a0<\/span><\/strong><\/p>\n
      <?php<\/span>\r\n$vehicle<\/span> \t=<\/span> [<\/span>'Car'<\/span>,<\/span> 'Motorcycle'<\/span>,<\/span> 'Bicycle'<\/span>]<\/span>;<\/span>\r\n$pop<\/span> \t\t=<\/span> array_pop (<\/span>$vehicle<\/span>)<\/span>;<\/span>\r\necho<\/span> $pop<\/span>;<\/span> \/\/ Bicycle<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$vehicle<\/span>)<\/span>;<\/span>\r\n\/<\/span>*<\/span> Result:<\/span>\r\nArray<\/span>\r\n(<\/span>\r\n    [<\/span>0<\/span>]<\/span> =<\/span>><\/span> Car\r\n    [<\/span>1<\/span>]<\/span> =<\/span>><\/span> Motorcycle\r\n)<\/span><\/code><\/pre>\n
      16.\u00a0\u0110\u1ea3o ng\u01b0\u1ee3c th\u1ee9 t\u1ef1 c\u1ee7a c\u00e1c gi\u00e1 tr\u1ecb m\u1ea3ng d\u00f9ng h\u00e0m\u00a0array_reverse<\/span><\/strong><\/p>\n
      <?php<\/span>\r\n$title<\/span> \t\t=<\/span> [<\/span>'Title 1'<\/span>,<\/span> 'Title 2'<\/span>,<\/span> 'Title 3'<\/span>]<\/span>;<\/span>\r\n$reversed<\/span>\t=<\/span> array_reverse<\/span>(<\/span>$title<\/span>)<\/span>;<\/span>\r\necho<\/span> '<pre>'<\/span>;<\/span> print_r<\/span>(<\/span>$reversed<\/span>)<\/span>;<\/span>\r\n\/* Result:\r\nArray\r\n(\r\n    [0] => Judul 3\r\n    [1] => Judul 2\r\n    [2] => Judul 1\r\n)\r\n*\/<\/span><\/code><\/pre>\n
      17.\u00a0T\u00ecm gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t v\u00e0 l\u1edbn nh\u1ea5t c\u1ee7a c\u00e1c gi\u00e1 tr\u1ecb m\u1ea3ng ta d\u00f9ng min hoac75 max<\/p>\n
      <?php<\/span>\r\n$value<\/span> \t=<\/span> [<\/span>90<\/span>,<\/span> 70<\/span>,<\/span> 85<\/span>,<\/span> 65<\/span>,<\/span> 80<\/span>]<\/span>;<\/span>\r\n$max<\/span> \t=<\/span> max<\/span>(<\/span>$value<\/span>)<\/span>;<\/span>\r\n$min<\/span> \t=<\/span> min<\/span>(<\/span>$value<\/span>)<\/span>;<\/span>\r\necho<\/span> $max<\/span>;<\/span> \/\/90<\/span>\r\necho<\/span> $min<\/span>;<\/span> \/\/65<\/span><\/code><\/pre>\n
      C\u1ea3m \u01a1n c\u00e1c b\u1ea1n<\/p>\n","protected":false},"excerpt":{"rendered":"
      H\u00f4m nay m\u00ecnh s\u1ebd gi\u1edbi thi\u1ec7u 17 c\u00e1ch s\u1eed d\u1ee5ng m\u1ea3ng trong php L\u01b0u \u00fd:trong b\u00e0i n\u00e0y m\u00ecnh s\u1ebd s\u1eed d\u1ee5ng [] cho phi\u00ean b\u1ea3n php 5.4 c\u00f2n b\u1ea1n s\u1eed d\u1ee5ng c\u00e1c phi\u00ean b\u1ea3n 5.3 tr\u1edf v\u1ec1 tr\u01b0\u1edbc th\u00ec s\u1eed d\u1ee5ng array() nh\u00e9. \u0110\u1ebfm s\u1ed1 l\u01b0\u1ee3ng m\u1ea3ng trong php ta s\u1eed d\u1ee5ng h\u00e0m COUNT() $vehicle […]<\/p>\n","protected":false},"author":1,"featured_media":239,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"amp_status":"","footnotes":""},"categories":[13],"tags":[64,79,78,81,73,68,69,67,72,71,70,77,76,80,75,74,63,66,65,62],"class_list":{"0":"post-163","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-php","8":"tag-15-ham-ve-mang-trong-php","9":"tag-array_key_exists-trong-php","10":"tag-array_keys-trong-php","11":"tag-array_map-trong-php","12":"tag-array_merge-trong-php","13":"tag-array_pop-trong-php","14":"tag-array_push-trong-php","15":"tag-array_reverse-trong-php","16":"tag-array_search-trong-php","17":"tag-array_shift-trong-php","18":"tag-array_unshift-trong-php","19":"tag-arsort-trong-php","20":"tag-asort-trong-php","21":"tag-in_array-trong-php","22":"tag-krsort-trong-php","23":"tag-ksort-trong-php","24":"tag-mang-trong-php","25":"tag-max-trong-php","26":"tag-min-trong-php","27":"tag-php-array"},"_links":{"self":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts\/163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/comments?post=163"}],"version-history":[{"count":2,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts\/163\/revisions"}],"predecessor-version":[{"id":240,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts\/163\/revisions\/240"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/media\/239"}],"wp:attachment":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/media?parent=163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/categories?post=163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/tags?post=163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}