PHP doubleval() Function: Usage and Examples

Converts a value to float; it is an alias of floatval().

What Is doubleval() in PHP?

Converts a value to float; it is an alias of floatval().

Its syntax is:

doubleval(mixed $value): float

Parameters:

• $value — Accepted as mixed; required argument.

Return type: float. Converting a malformed numeric string may yield 0 or a partial numeric value. Validate external input.

Availability: Core PHP.

Example 1: Basic Usage

<?php

var_dump(doubleval("12.5"));

Output:

float(12.5)

Converting a malformed numeric string may yield 0 or a partial numeric value. Validate external input.

Example 2: A Different Input

<?php

var_dump(doubleval(8));

Output:

float(8)

Converting a malformed numeric string may yield 0 or a partial numeric value. Validate external input.

Practical Example: Applying It in a Program

<?php

$values = ["2.25", "3.5"]; $total = 0.0; foreach ($values as $value) { $total += doubleval($value); } echo $total;

Output:

5.75

Converting a malformed numeric string may yield 0 or a partial numeric value. Validate external input.

Important Behavior and Edge Cases

• Key behavior: Converting a malformed numeric string may yield 0 or a partial numeric value. Validate external input.
• Environment: Core PHP.

Comparison With Related Functions

Common Beginner Mistakes

Key Takeaways

• Converts a value to float; it is an alias of floatval().
• Converting a malformed numeric string may yield 0 or a partial numeric value. Validate external input.
• Core PHP.

Summary: Converting a malformed numeric string may yield 0 or a partial numeric value. Validate external input.