PHP floatval() Function: Usage and Examples

Converts a scalar value to PHP floating-point form.

What Is floatval() in PHP?

Converts a scalar value to PHP floating-point form.

Its syntax is:

floatval(mixed $value): float

Parameters:

• $value — Accepted as mixed; required argument.

Return type: float. Invalid strings can convert to 0 and floats are unsuitable for exact financial arithmetic. Validate inputs first.

Availability: Core PHP.

Example 1: Basic Usage

<?php

var_dump(floatval("12.75"));

Output:

float(12.75)

Invalid strings can convert to 0 and floats are unsuitable for exact financial arithmetic. Validate inputs first.

Example 2: A Different Input

<?php

var_dump(floatval("invalid"));

Output:

float(0)

Invalid strings can convert to 0 and floats are unsuitable for exact financial arithmetic. Validate inputs first.

Practical Example: Applying It in a Program

<?php

$prices = ["12.50", "7.25"]; $sum = 0.0; foreach ($prices as $price) { $sum += floatval($price); } echo number_format($sum, 2);

Output:

19.75

Invalid strings can convert to 0 and floats are unsuitable for exact financial arithmetic. Validate inputs first.

Important Behavior and Edge Cases

• Key behavior: Invalid strings can convert to 0 and floats are unsuitable for exact financial arithmetic. Validate inputs first.
• Environment: Core PHP.

Comparison With Related Functions

Common Beginner Mistakes

Key Takeaways

• Converts a scalar value to PHP floating-point form.
• Invalid strings can convert to 0 and floats are unsuitable for exact financial arithmetic. Validate inputs first.
• Core PHP.

Summary: Invalid strings can convert to 0 and floats are unsuitable for exact financial arithmetic. Validate inputs first.