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Summary and techniques of several methods for detecting data types in PHP
- 黄舟Original
- 2017-03-06 09:28:411234browse
The following editor will bring you several methods of detecting data types in PHP (summary). The editor thinks it is quite good, so I will share it with you now and give it as a reference for everyone. Let’s follow the editor and take a look
In JavaScript, use typeof to detect basic data types, and use instanceof to detect reference data types. In PHP, there are also methods to detect data types, as follows:
1. Data type of output variable (gettype)
<?php $arry = array('a','b','c'); echo gettype($arry);//array ?>
2. Data type of output variable, included quantity and specific content (var_dump)
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<?php $str = 'hello world'; var_dump($str);//string(11) "hello world" ?>
3. Detect whether a variable is a specified data type (is_array, is_string, is_int, is_double, etc. ), returns 1 if true, returns null if false.
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<?php
$num = 123;
if(is_array($num)){
echo '这是一个数组';
}else if(is_string($num)){
echo '这是一个字符串';
}else if(is_int($num)){
echo '这是一个整数';
}else if(is_double($num)){
echo '这是一个浮点数';
}
?>
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