How to merge arrays and convert them into numeric types in php

Method: 1. Use "array_merge (array 1, array 2...)" to merge one or more arrays into one array; 2. Use "implode (merge array)" to convert the merged array into String; 3. Use "settype (string, type identifier)" to convert the string to the specified numerical type (integer or floating point number).

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In PHP, you can use array_merge () merge the arrays, and then convert the array type to a numeric type.

Step 1: Use array_merge() to merge arrays

The array_merge() function is used to merge one or more arrays into one array.

Note: If two or more array elements have the same key name, the last element will overwrite the other elements.

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$a1=array(1,2,3,4,5,0);
$a2=array(6,7,8,9,10);
$arr=array_merge($a1,$a2);
var_dump($arr);
?>

Step 2: Use the implode() function to convert the merged array into a string

implode() function can convert a Convert one-dimensional array to string

$str=implode($arr);
var_dump($str);

Step 3: Use settype() to convert the string to numeric type

settype ($var,$type)Used to set the variable $var to the specified $type type.

The numeric type can be set when $type is set to the following characters

• "integer" (or "int", starting from PHP 4.2.0)

• "float" (only available after PHP 4.2.0, "double" used in older versions is now deprecated)

settype($str,"int");
var_dump($str);

settype($str,"float");
var_dump($str);

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