intval() to get integer from data in php
Convert a value to an integer
intval() returns the integer value of a scalar and can optionally interpret strings in another base. For validating user input, conversion and validation are different tasks.
$raw = '42';
$number = intval($raw);
echo $number; // 42
$validated = filter_var($raw, FILTER_VALIDATE_INT);
var_dump($validated); // int(42)
This is the recommended starting pattern. The detailed examples below are retained for explanation, comparison and related variations.
intval($value, $base );
$base : optional , base to consider
Examples using intval()
Code with outputecho intval(23); // 23
echo "<br>";
echo intval('23'); // 23
echo "<br>";
echo intval('23.34'); // 23
echo "<br>";
echo intval('023'); // 23
echo "<br>";
echo intval(023); // 19
echo "<br>";
echo intval('23',8); // 19
echo "<br>";
echo intval('2e10'); // 2
echo "<br>";
echo intval(2e10); // -1474836480
Example 1: Basic Usage of intval()
This example demonstrates how to convert a string with numeric content into an integer using intval().
$value = "123abc";
$int_value = intval($value);
echo "Converted value: " . $int_value;
Converted value: 123
Example 2: Handling Float Values
This example shows how intval() truncates the decimal part of a float.
$float_value = 45.67;
$int_value = intval($float_value);
echo "Truncated integer: " . $int_value;
Truncated integer: 45
Example 3: Using intval() with Different Bases
Use intval() to convert values from different base systems, such as hexadecimal to decimal.
$hex_value = "1A";
$int_value = intval($hex_value, 16);
echo "Hex to integer: " . $int_value;
Hex to integer: 26
ctype_digit() FILTER_VALIDATE_INT() is_numeric() is_numeric()
PHP Form ctype_alpha():Alphabetic chars only
Subhendu Mohapatra
Author & Instructor at plus2net
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