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    PHP 5 Arrays

    Uploaded by

    Juwee
    This document provides an overview of PHP arrays: - PHP arrays allow storing multiple values in a single variable. There are three types: indexed, associative, and multidimensional. - Indexed arrays assign numeric indexes automatically or manually. Associative arrays use named keys. - Arrays can be accessed using indexes/keys and functions like count() are used to get the length. Foreach loops iterate through arrays. - The document provides examples of creating, accessing, and looping through different array types in PHP.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    PHP 5 Arrays

    Uploaded by

    Juwee
    34 views8 pages
    This document provides an overview of PHP arrays: - PHP arrays allow storing multiple values in a single variable. There are three types: indexed, associative, and multidimensional. - Indexed arrays assign numeric indexes automatically or manually. Associative arrays use named keys. - Arrays can be accessed using indexes/keys and functions like count() are used to get the length. Foreach loops iterate through arrays. - The document provides examples of creating, accessing, and looping through different array types in PHP.

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    This document provides an overview of PHP arrays: - PHP arrays allow storing multiple values in a single variable. There are three types: indexed, associative, and multidimensional. - Indexed arrays assign numeric indexes automatically or manually. Associative arrays use named keys. - Arrays can be accessed using indexes/keys and functions like count() are used to get the length. Foreach loops iterate through arrays. - The document provides examples of creating, accessing, and looping through different array types in PHP.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    34 views8 pages

    PHP 5 Arrays

    Uploaded by

    Juwee
    This document provides an overview of PHP arrays: - PHP arrays allow storing multiple values in a single variable. There are three types: indexed, associative, and multidimensional. - Indexed arrays assign numeric indexes automatically or manually. Associative arrays use named keys. - Arrays can be accessed using indexes/keys and functions like count() are used to get the length. Foreach loops iterate through arrays. - The document provides examples of creating, accessing, and looping through different array types in PHP.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
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    PHP 5 Arrays
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    Anarraystoresmultiplevaluesinonesinglevariable:

    Example

    <?php
    $cars=array("Volvo","BMW","Toyota");
    echo"Ilike".$cars[0].",".$cars[1]."and".$cars[2].
    ".";
    ?>

    PHP

    Runexample

    What is an Array?
    Anarrayisaspecialvariable,whichcanholdmorethanonevalueatatime.
    Ifyouhavealistofitems(alistofcarnames,forexample),storingthecarsinsingle
    variablescouldlooklikethis:

    $cars1="Volvo";
    $cars2="BMW";
    $cars3="Toyota";
    However,whatifyouwanttoloopthroughthecarsandfindaspecificone?Andwhat
    ifyouhadnot3cars,but300?

    Thesolutionistocreateanarray!
    Anarraycanholdmanyvaluesunderasinglename,andyoucanaccessthevalues
    byreferringtoanindexnumber.

    Create an Array in PHP


    InPHP,thearray()functionisusedtocreateanarray:

    array();
    InPHP,therearethreetypesofarrays:
    IndexedarraysArrayswithanumericindex
    AssociativearraysArrayswithnamedkeys
    MultidimensionalarraysArrayscontainingoneormorearrays

    PHP Indexed Arrays


    Therearetwowaystocreateindexedarrays:
    Theindexcanbeassignedautomatically(indexalwaysstartsat0),likethis:

    $cars=array("Volvo","BMW","Toyota");
    ortheindexcanbeassignedmanually:

    $cars[0]="Volvo";
    $cars[1]="BMW";
    $cars[2]="Toyota";
    Thefollowingexamplecreatesanindexedarraynamed$cars,assignsthreeelements
    toit,andthenprintsatextcontainingthearrayvalues:

    Example
    <?php
    $cars=array("Volvo","BMW","Toyota");
    echo"Ilike".$cars[0].",".$cars[1]."and".$cars[2].

    ".";
    ?>
    Runexample

    Get The Length of an Array The count


    Function
    Thecount()functionisusedtoreturnthelength(thenumberofelements)ofan
    array:

    Example
    <?php
    $cars=array("Volvo","BMW","Toyota");
    echocount($cars);
    ?>
    Runexample

    Loop Through an Indexed Array


    Toloopthroughandprintallthevaluesofanindexedarray,youcoulduseaforloop,
    likethis:

    Example
    <?php
    $cars=array("Volvo","BMW","Toyota");
    $arrlength=count($cars);
    for($x=0;$x<$arrlength;$x++){
    echo$cars[$x];
    echo"<br>";

    }
    ?>
    Runexample

    PHP Associative Arrays


    Associativearraysarearraysthatusenamedkeysthatyouassigntothem.
    Therearetwowaystocreateanassociativearray:

    $age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
    or:

    $age['Peter']="35";
    $age['Ben']="37";
    $age['Joe']="43";
    Thenamedkeyscanthenbeusedinascript:

    Example
    <?php
    $age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
    echo"Peteris".$age['Peter']."yearsold.";
    ?>
    Runexample

    Loop Through an Associative Array


    Toloopthroughandprintallthevaluesofanassociativearray,youcouldusea
    foreachloop,likethis:

    Example
    <?php
    $age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
    foreach($ageas$x=>$x_value){
    echo"Key=".$x.",Value=".$x_value;
    echo"<br>";
    }
    ?>
    Runexample

    Multidimensional Arrays
    MultidimensionalarrayswillbeexplainedinthePHPadvancedsection.

    Complete PHP Array Reference


    Foracompletereferenceofallarrayfunctions,gotoourcompletePHPArray
    Reference.
    Thereferencecontainsabriefdescription,andexamplesofuse,foreachfunction!

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