3 methods: 1. Use intval() to round directly, the syntax is "intval(value)". 2. Use settype() to set the type of the specified value to "int", the syntax is "settype(value,"int")". 3. To force conversion type, add "(int)" before the specified value, the syntax is "value (int)".
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
int (integer) Type
In PHP, the integer variable is called integer or int type, which is used to represent an integer. The rules of the integer type are as follows:
-
Integer type must have at least one digit (0~9);
Integer type cannot contain commas or spaces;
Integer type It cannot contain a decimal point;
The integer can be a positive or negative number.
The value range of the integer type must be between -2E31 and 2E31, and can be expressed in three formats, namely decimal, hexadecimal (prefixed with 0x) and Octal (prefixed with 0).
So how does PHP convert a number (string value or floating point) into int (integer) type?
php method to convert a number into int type
Method 1: Use intval() function
intval() rounds directly, discards decimals, and retains integers
<?php $str="123.9"; var_dump($str); $int=intval($str); //转换后数值:123 var_dump($int); ?>
Method 2: Use settype() function
settype(var,type)
The function is used to set the type of a variable and can convert the variable to a specified type.
Just set the parameter type to "int" or "integer" to convert the variable to int type. Note: This function modifies the original variable, and the return value is a Boolean type (TRUE is returned when the setting is successful, and FALSE is returned when it fails.).
<?php $str="123.9"; var_dump($str); $int=settype($str,"int"); var_dump($int); //输出bool(true) var_dump($str); //输出int(12) ?>
Method 3: Use forced type conversion
Add the target type enclosed in parentheses before the number to be converted "(int)" or "(integer)" to force it to an integer type.
<?php $n=123.9; var_dump($n); $num1=(integer)$n; $num2=(int)$n; var_dump($num1); var_dump($num2); ?>
Recommended learning: "PHP Video Tutorial"
The above is the detailed content of How to convert a number to int (integer) type in php. For more information, please follow other related articles on the PHP Chinese website!

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

SublimeText3 Linux new version
SublimeText3 Linux latest version

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

WebStorm Mac version
Useful JavaScript development tools

SublimeText3 English version
Recommended: Win version, supports code prompts!
