The examples in this article describe the mathematical operation skills of PHP introductory tutorial. Share it with everyone for your reference, the details are as follows:
Demo1.php
<?php // $a = '5'; // $b = 7+$a; // echo $b; $a = 'a'; $b = 7+$a; echo $b; ?>
Demo2.php
<?php
$a = 10.0;
//is_int -- 检测变量是否是整数
if(is_int($a)) {
echo '通过';
}else{
echo '不通过';
}
?>
Demo3.php
<?php
$a = 10.0;
//is_int -- 检测变量是否是整数
if(is_int($a)) {
echo '通过';
}else{
echo '不通过';
}
?>
Demo4.php
<?php //rand -- 产生一个随机整数 //echo rand(0,10); //echo mt_rand(0,100); //echo getrandmax();//最大数32767 //echo mt_getrandmax();//最大数2147483647 ?>
Demo5.php
<?php // $i = 123456789.4454; // $b = number_format($i,2); // echo $b; //123,456,789.45 $i = 12378456.456789; $b = number_format($i,2,'#','@'); echo $b;//12@378@456#46 ?>
Demo6.php
<?php // $a = -6; // echo abs($a);//绝对值 // $b = 5.66; // echo floor($b);//舍去法取整 // echo round($b);//四舍五入 echo min(1,23,456,87,45,7,54);//1 求最小值或数组中最小值 echo max(1,23,456,87,45,7,54);//456 求最大值或数组中最大值 echo pi();//3.14159265359 echo pow(2,6);//64 ?>
I hope this article will be helpful to everyone in PHP program design.
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