How to convert int in php

How to convert int in php: 1. Create a PHP sample file; 2. Determine the value to be converted; 3. Use the "(int)" or "(integer)" method to force conversion, the syntax is as follows "var_dump((int) "221");echo "
";var_dump((integer)"-25"".

This tutorial operation Environment: Windows 7 system, PHP version 8.1, Dell G3 computer.

php How to convert int?

php int type conversion

int is a collection ℤ = a number in {…, -2, -1, 0, 1, 2, …}.

To convert a value to int,

Use (int) or (integer) cast.

However, in most cases no cast is required, because when an operator, function or flow control requires an int parameter, the value is automatically converted. You can also use the function intval() To convert a value to int type.

intval() syntax

intval(mixed $value, int $base = 10): int

Parameters

value

The quantity value to be converted to integer

base

The hexadecimal system used for conversion

<?php
var_dump(
    (int) "221"                              // int(221)
);
echo "<br>";
var_dump(
    (integer)"-25"                          //int(-25)
);
echo "<br>";
echo intval(42);                      // 42
echo "<br>";
echo intval(4.2);                     // 4
echo "<br>";
echo intval(&#39;42&#39;);                    // 42
echo "<br>";
echo intval(&#39;+42&#39;);                   // 42
echo "<br>";
echo intval(&#39;-42&#39;);                   // -42
echo "<br>";
echo intval(042);                     // 34
echo "<br>";
echo intval(&#39;042&#39;);                   // 42
echo "<br>";
echo intval(2e2);                    // 200 e后面表示添加几个0
echo "<br>";
echo intval(&#39;1e10&#39;);                  // 1
echo "<br>";
echo intval(0x1A);                    // 26 0x开头是16进制
echo "<br>";
echo intval(42000000);                // 42000000
echo "<br>";
echo intval(420000000000000000000);   // -4275113695319687168
echo "<br>";
echo intval(&#39;420000000000000000000&#39;); // 9223372036854775807
echo "<br>";
echo intval(42, 8);                   // 42
echo "<br>";
echo intval(&#39;42&#39;, 8);                 // 34
echo "<br>";
echo intval(array());                 // 0
echo "<br>";
echo intval(array(&#39;foo&#39;, &#39;bar&#39;));     // 1
echo "<br>";
echo intval(false);                   // 0
echo intval(true);                    // 1
?>

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