Access variable from function inside of nested function

In PHP, you have to use the global keyword in order to access a variable from the global scope when inside of a function. However, how can you access a variable within the scope of a parent function?

In PHP, you have to use the global keyword in order to access a variable from the global scope when inside of a function. However, how can you access a variable within the scope of a parent function?

In the example:

function foo() {
    $content = 'foobar';
function bar() {
    echo $content; // echos nothing
}

}

How can I access the $content variable?

Higher Order Functions in PHP - StackGulp PHP News

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Top 12 Array Functions In PHP

Top 12 Array Functions In PHP

Top 12 PHP Array Functions – Today we would love to share with you most commonly useful php array functions.We will develope anything using php we need to know very common php array functions. As we will discuss below php array functions is useful, very easy and simple.

Array is collection of similar datatype values. One array can contain set diffrent of values. Three type of array are available first is indexed, associative, and multidimensional arrays in PHP.

PHP Intro

Now the new version of php is 7.3 launch with many features and bugs improvent(fixed). PHP is most popular progmming lanugage in world. PHP is know as Hypertext Preprocessor. The initiative was the name person home page. Most websites and web apps are developed. It is a server side scripting language. PHP script is excute only server side. It is used to develop Static websites pages or Dynamic websites pages or Web applications

PHP latest version 7.3 new features like :

Flexible Heredoc and Nowdoc Syntax

PCRE2 Migration

Multiple MBString Improvements

LDAP Controls Support

Improved FPM Logging

Windows File Deletion Improvements

Several Deprecations

Array()

This is simple array function.

<?php
 $mobile=array("Samsung","MI","Lenovo"); 
 echo "I like " . $mobile[0] . ", " . $mobile[1] . " & " . $mobile[2] . ".";
?>

Array Unique

As the name suggest array unique function is remove duplicate value in an array.

<?php
$a=array("a"=>"56","b"=>"50","c"=>"56");
print_r(array_unique($a));
 ?>

Array Difference

This array_diff () function is used know difference between two or more arrays.

<?php
 $a1=array("1"=>"banana","2"=>"apple","3"=>"orange","4"=>"fruits");
 $a2=array("1"=>"banana","2"=>"apple","3"=>"fruits");
 $result=array_diff($a1,$a2);
 print_r($result);
 ?>

Array Merge

Array_merge() is used to merge two or more array to one array

<?php  
 $a1=array("1"=>"banana","2"=>"apple");
 $a2=array("1"=>"grapes","2"=>"fruits");
 $result=array_merge($a1,$a2);
 print_r($result);
?> 

Array Random

This function is used to generate random keys from array.

<?php
 $a=array("100","200","500","6000","7000");
 $random_keys=array_rand($a,4);
 echo $a[$random_keys[0]]."<br>";
 echo $a[$random_keys[1]]."<br>";
 echo $a[$random_keys[2]]."<br>";
 echo $a[$random_keys[3]];
 ?>

Array Replace

array_replace() function is used to replace the value of arrays.

<?php
 $a1=array("500","560");
 $a2=array("1000","2000");
 print_r(array_replace($a1,$a2));
 ?>

Array Reverse

This Array reserse function is reverse the order of array.

<?php
 $a=array("a"=>"Volvo","b"=>"BMW","c"=>"Toyota");
 print_r(array_reverse($a));
 ?>

Array Search

This function is used to search a value in array.

<?php
 $a=array("a"=>"red","b"=>"green","c"=>"blue");
 echo array_search("red",$a);
 ?>

Array Sum

Array_sum function is used to sum of all value in array.

<?php
 $a=array(25,50,75);
 echo array_sum($a);
 ?>

Array Chunk

This array chunk function is mostly used to split an array to chunks.

 <?php 
 $cars=array("Volvo","BMW","Toyota","Honda","Mercedes","Farari");
 print_r(array_chunk($cars,2));
 ?>

Array Pop

The Array Pop function used to remove element of array.

<?php 
 $a=array("5","10","15");
 array_pop($a);
 print_r($a);
 ?>

Array Push

The Array Push function used to add new element of array.

<?php 
 $a=array("10","15","20");
 array_pop($a);
 print_r($a);
 ?>

Conclusion

Today we have discussed php array functions.

If you have any questions or thoughts to share, use the comment form below to reach us

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How to get php function ouptut on client side?

I am trying to execute PHP function(server-side) on button click in html (client-side). I want to pass a parameter to PHP function as&nbsp;<strong>name</strong>&nbsp;&amp; in return I want output as&nbsp;<code>Hello name</code>. I tried, but it's not showing,

I am trying to execute PHP function(server-side) on button click in html (client-side). I want to pass a parameter to PHP function as name & in return I want output as Hello name. I tried, but it's not showing,

Server-side

The PHP file name is "name.php" having function greet() with parameter $name is as follows:

<?php
function greet($name)
{
   echo "hello $name";
}
?>

Client-side

The HTML file consists of a button "Click me" which should send the name John to PHP page, and the greet() function should execute and output should display at client side as "Hello John" is as follows:

<html>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function()
{
$("#button").click(function(){
$.ajax({
type: "POST",
url: "name.php",
data: { name: "John" }
}).done(greet(data)
{
alert( "Data Saved: " + data);
});
});
});
</script>

<input type="button" id="button" value="Click me">

</html>

I have used Ajax method for calling PHP function if any other POST method can give output, then please let me know.

Can someone please help to how to get output from PHP function to client-side on button click.