How to convert string to number in php while retaining two decimal places

php method to convert a string into a number and retain two decimal places: 1. Use the number_format() function, syntax "number_format($str, 2)"; 2. Use floatval() and round() Function, syntax "round(floatval($str))".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php will string Convert to a number and keep two decimal places

1. Use the number_format() function

The number_format() function is used to convert the string to number. It returns a formatted number on success, otherwise gives E_WARNING on failure.

<?php 
$str = "32.314"; 
// 使用number_format()函数将字符串转换为数字
echo number_format($str), "<br>"; 
// 函数的作用是:将字符串转换为数字
echo number_format($str, 2); 
?>

2. Use floatval() round() function

floatval() function can convert a string into a floating point number , and the round() function rounds floating point numbers to two decimal places.

<?php 
$str = "32.314"; 

echo round(floatval($str))."<br>"; 

echo round(floatval($str), 2); 
?>

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