论坛 › PHP › 有必要跑到这里来记录几条学习笔记，感兴趣的看一下就行了

shang2010 发表于 2012-06-13 14:46

有必要跑到这里来记录几条学习笔记，感兴趣的看一下就行了

{:2_168:}

--
php打印arrayvar_dump($array)

shang2010 发表于 2012-06-13 14:48

如果浏览器看到空白，请用测试命令php -f filepath看看错在哪里

shang2010 发表于 2012-06-13 14:50

本帖最后由 shang2010 于 2012-06-28 17:11 编辑

执行一条select语句，官方示范代码修订版
$mysqli = new mysqli("localhost", "root", "root", "test");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query = "SELECT now()";

if ($result = $mysqli->query($query)) {

    /* fetch object array */
    while ($row = $result->fetch_row()) {
      printf ("%s \n", $row);
    }

    /* free result set */
    $result->close();
}

/* close connection */
$mysqli->close();

shang2010 发表于 2012-06-13 14:52

query后的result对象
mysqli_result implements Traversable{
/* Properties */
int $current_field ;
int $field_count;
array $lengths;
int $num_rows;
/* Methods */
bool data_seek ( int $offset )
mixed fetch_all ([ int $resulttype = MYSQLI_NUM ] )
mixed fetch_array ([ int $resulttype = MYSQLI_BOTH ] )
array fetch_assoc ( void )
object fetch_field_direct ( int $fieldnr )
object fetch_field ( void )
array fetch_fields ( void )
object fetch_object ([ string $class_name [, array $params ]] )
mixed fetch_row ( void )
bool field_seek ( int $fieldnr )
void free ( void )
}

http://www.php.net/manual/en/class.mysqli-result.php

pitonas 发表于 2012-06-13 16:20

期待下次。:victory:

shang2010 发表于 2012-06-14 09:59

html使用uft8编码
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

shang2010 发表于 2012-06-27 12:01

http://php.net/manual/en/function.hash.php
nmmm at nmmm dot nu 20-Jul-2011 01:50
I was interested how "long" each hash is, so I did:
$data = "hello";

foreach (hash_algos() as $v) {
         $r = hash($v, $data, false);
         printf("%-12s %3d %s\n", $v, strlen($r), $r);
}


which produce (long hashes are cropped)

md2         32 a9046c73e00331af68917d3804f70655                  
md4         32 866437cb7a794bce2b727acc0362ee27
md5         32 5d41402abc4b2a76b9719d911017c592
sha1          40 aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d
sha256      64 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e730
sha384      96 59e1748777448c69de6b800d7a33bbfb9ff1b463e44354c3553
sha512       128 9b71d224bd62f3785d96d46ad3ea3d73319bfbc2890caadae2d
ripemd128   32 789d569f08ed7055e94b4289a4195012
ripemd160   40 108f07b8382412612c048d07d13f814118445acd
ripemd256   64 cc1d2594aece0a064b7aed75a57283d9490fd5705ed3d66bf9a
ripemd320   80 eb0cf45114c56a8421fbcb33430fa22e0cd607560a88bbe14ce
whirlpool    128 0a25f55d7308eca6b9567a7ed3bd1b46327f0f1ffdc804dd8bb
tiger128,3    32 a78862336f7ffd2c8a3874f89b1b74f2
tiger160,3    40 a78862336f7ffd2c8a3874f89b1b74f2f27bdbca
tiger192,3    48 a78862336f7ffd2c8a3874f89b1b74f2f27bdbca39660254
tiger128,4    32 1c2a939f230ee5e828f5d0eae5947135
tiger160,4    40 1c2a939f230ee5e828f5d0eae5947135741cd0ae
tiger192,4    48 1c2a939f230ee5e828f5d0eae5947135741cd0aefeeb2adc
snefru      64 7c5f22b1a92d9470efea37ec6ed00b2357a4ce3c41aa6e28e3b
gost          64 a7eb5d08ddf2363f1ea0317a803fcef81d33863c8b2f9f6d7d1
adler32      8 062c0215
crc32          8 3d653119
crc32b         8 3610a686
haval128,3    32 85c3e4fac0ba4d85519978fdc3d1d9be
haval160,3    40 0e53b29ad41cea507a343cdd8b62106864f6b3fe
haval192,3    48 bfaf81218bbb8ee51b600f5088c4b8601558ff56e2de1c4f
haval224,3    56 92d0e3354be5d525616f217660e0f860b5d472a9cb99d6766be
haval256,3    64 26718e4fb05595cb8703a672a8ae91eea071cac5e7426173d4c
haval128,4    32 fe10754e0b31d69d4ece9c7a46e044e5
haval160,4    40 b9afd44b015f8afce44e4e02d8b908ed857afbd1
haval192,4    48 ae73833a09e84691d0214f360ee5027396f12599e3618118
haval224,4    56 e1ad67dc7a5901496b15dab92c2715de4b120af2baf661ecd92
haval256,4    64 2d39577df3a6a63168826b2a10f07a65a676f5776a0772e0a87
haval128,5    32 d20e920d5be9d9d34855accb501d1987
haval160,5    40 dac5e2024bfea142e53d1422b90c9ee2c8187cc6
haval192,5    48 bbb99b1e989ec3174019b20792fd92dd67175c2ff6ce5965
haval224,5    56 aa6551d75e33a9c5cd4141e9a068b1fc7b6d847f85c3ab16295
haval256,5    64 348298791817d5088a6de6c1b6364756d404a50bd64e645035f

maochanglu 发表于 2012-06-28 14:32

看到第一帖，我被吓到了。这么简单也要分享。

ulovko 发表于 2012-06-28 16:41

感谢分享 ^_^ :emn31:

hbeimf 发表于 2012-06-29 18:21

:em03::em03::em03::em03::em03::em03:

查看完整版本: 有必要跑到这里来记录几条学习笔记，感兴趣的看一下就行了