echo ,print的区别在于echo 可以输出多个变量值,而print只有一个变量,做为一个字符串输出. 另一点区别在于echo 没有返回值,print有返回值1.print不能输出数组和对象。 print_r可以输出stirng、int、float、array、object等,输出array时会用结构表示,print_r输出成功时返回true; 而且print_r可以通过print_r($str,...
$table->double('column', 15, 8);DOUBLE equivalent with precision, 15 digits in total and 8 after the decimal point. $table->enum('choices', ['foo', 'bar']);ENUM equivalent for the database. $table->float('amount', 8, 2);FLOAT equivalent for the database, 8 digits in total and...
The formatting specifier for a float value is%fand for a string%s. $ php height.php Height: 172.300000 cm We might not like the fact that the number in the previous example has 6 decimal places by default. We can control the number of the decimal places in the formatting specifier. heigh...
echo PHP_EOL;echo 'Using PHP_ROUND_HALF_ODD with 1 decimal digit precision' . PHP_EOL;var_dump(round( 1.55, 1, PHP_ROUND_HALF_ODD));var_dump(round(-1.55, 1, PHP_ROUND_HALF_ODD));?> 以上示例会输出: Using PHP_ROUND_HALF_UP with 1 decimal digit precision float(1.6) float(-1.6)...
?> #Result With 2 decimals: 123.00With no decimals: 123 print_r()和var_dump() print_r()可以把字符串和数字简单地打印出来,而数组则以括起来的键和值得列表形式显示,并以Array开头。如, 对象也一样。如, 但print_r()输出布尔值和NULL的结果没有意义,因为都是打印"n"。因此用var_dump()函数更适...
So, that's all lovely then. In some cases you may want to get the maximum value for a float without getting "INF". var_dump(1.8e308); will usually show: float(INF) I wrote a tiny function that will iterate in order to find the biggest non-infinite float value. It comes with a ...
1use Illuminate\Database\Schema\Blueprint; 2use Illuminate\Support\Facades\Schema; 3 4Schema::create('users', function (Blueprint $table) { 5 $table->id(); 6 $table->string('name'); 7 $table->string('email'); 8 $table->timestamps(); 9});...
SQLSRV_PHPTYPE_FLOAT Float SQLSRV_PHPTYPE_STREAM($encoding1) 資料流 SQLSRV_PHPTYPE_STRING($encoding1) String SQLSRV_PHPTYPE_STREAM 和SQLSRV_PHPTYPE_STRING 可接受指定資料流編碼的參數。 下表包含是可接受之參數的 SQLSRV 常數,以及對應編碼的描述。 展開資料表 SQLSRV 常數描述 SQLSRV_ENC_BIN...
5.0.3开始,在计算 DECIMAL 值和舍入精确值的时候采用精确数学。 ◆在以前,等待超时的锁会导致 InnoDB回滚当前全部事务,从5.0.13开始,就只回滚最近的SQL语句了。 ◆在4.1.13/5.0.8以前,DATETIME 的加0后就转换成 YYYYMMDDHHMMSS 格式,现在变为YYYYMMDDHHMMSS.000000 格式了 ◆4.1中,FLOAT 或 DOUBLE 之间的...
Number_format()要求参数1为float,给定字符串 my Code:public static function format_inr($value, $decimals = 0) { setlocale(LC_MONETARY, 'en_IN'); if (function_exists('money_format')) { return money_format('%!i.' . $decimals . 'i', round($value)); } else { return number_format...