Rechercher une fonction PHP

max

(PHP 4, PHP 5, PHP 7)

maxFind highest value

Description

max ( array $values ) : mixed
max ( mixed $value1 [, mixed $... ] ) : mixed

If the first and only parameter is an array, max() returns the highest value in that array. If at least two parameters are provided, max() returns the biggest of these values.

Note:

Values of different types will be compared using the standard comparison rules. For instance, a non-numeric string will be compared to an integer as though it were 0, but multiple non-numeric string values will be compared alphanumerically. The actual value returned will be of the original type with no conversion applied.

Caution

Be careful when passing arguments with mixed types values because max() can produce unpredictable results.

PHP: max - Manual Home of Manuel PHP  Contents Haut

Parameters

values

An array containing the values.

value1

Any comparable value.

...

Any comparable value.

PHP: max - Manual Home of Manuel PHP  Contents Haut

Return Values

max() returns the parameter value considered "highest" according to standard comparisons. If multiple values of different types evaluate as equal (e.g. 0 and 'abc') the first provided to the function will be returned.

If an empty array is passed, then FALSE will be returned and an E_WARNING error will be emitted.

PHP: max - Manual Home of Manuel PHP  Contents Haut

Examples

Example #1 Example uses of max()

<?php
echo max(23167);  // 7
echo max(array(245)); // 5

// The string 'hello' when compared to an int is treated as 0
// Since the two values are equal, the order they are provided determines the result
echo max(0'hello');     // 0
echo max('hello'0);     // hello

// Here we are comparing -1 < 0, so 'hello' is the highest value
echo max('hello', -1);    // hello

// With multiple arrays of different lengths, max returns the longest
$val max(array(222), array(1111)); // array(1, 1, 1, 1)

// Multiple arrays of the same length are compared from left to right
// so in our example: 2 == 2, but 5 > 4
$val max(array(248), array(251)); // array(2, 5, 1)

// If both an array and non-array are given, the array will be returned
// as comparisons treat arrays as greater than any other value
$val max('string', array(257), 42);   // array(2, 5, 7)

// If one argument is NULL or a boolean, it will be compared against
// other values using the rule FALSE < TRUE regardless of the other types involved
// In the below example, -10 is treated as TRUE in the comparison
$val max(-10FALSE); // -10

// 0, on the other hand, is treated as FALSE, so is "lower than" TRUE
$val max(0TRUE); // TRUE
?>

PHP: max - Manual Home of Manuel PHP  Contents Haut

See Also

  • min() - Find lowest value
  • count() - Count all elements in an array, or something in an object

Find a PHP function

English translation

You have asked to visit this site in English. For now, only the interface is translated, but not all the content yet.

If you want to help me in translations, your contribution is welcome. All you need to do is register on the site, and send me a message asking me to add you to the group of translators, which will give you the opportunity to translate the pages you want. A link at the bottom of each translated page indicates that you are the translator, and has a link to your profile.

Thank you in advance.

Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-max.html

The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.

References

  1. View the html document Language of the document:fr Manuel PHP : http://php.net

These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

Contents Haut