php multiple calling multiple functions

Question

i have the following functions

function a ($var) {
somecode;
b($var);

}

function b ($var) {
c($var);
}

function c($var) {

}

then suppose that i call these functions in a script

a(1);
a(2);

in programming languages like java for example, the normal order of execution is a(1) is executed then b(1) then c(1) then a(2) then b(2) then c(2).it means that a(2) is not called until all functions called by a(1) finish execution which inturn call other functions. but in php it didnt follow like that.in php it may go like that: a(1) then b(1) then a(2) then c(1). how to make sure that a(2) is not called until a(1) and all the functions that a(1) may call finish executing ? by the way i am calling the functions in cakephp with autorender=false, is cakephp responsible for that ?

try debug your code ! function a ($var) { echo 'function a with : ' , $var , '<br />'; b($var); } function b ($var) { echo 'function b with : ' , $var , '<br />'; } — Shahrokhian
– Shahrokhian, Commented Feb 18, 2014 at 12:03
It should work exactly like you want it too, because PHP is run from top to bottom. It's more likely to be an issue in your code. — NoGall
– NoGall, Commented Feb 18, 2014 at 12:05
well maybe "somecode" include async function like ajax? If so, then you need to use callback function. — Bojan Kovacevic
– Bojan Kovacevic, Commented Feb 18, 2014 at 12:06
@GolezTrol - Wrong use of word. What I was aiming for was what you have in your answer. It's been a stressy day! My apologies. — NoGall
– NoGall, Commented Feb 18, 2014 at 12:07
i debuged the code , it is in cakephp, it didnt go in the desired order — mostafa khansa
– mostafa khansa, Commented Feb 18, 2014 at 12:08

GolezTrol · Accepted Answer · 2014-02-18 12:05:31Z

1

PHP runs sequential, like the other examples you gave. There is no different order, and nothing special you need to do to make this work.

answered Feb 18, 2014 at 12:05

GolezTrol

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5 Comments

mostafa khansa Over a year ago

inside code is insert queries, so when i debuged , i noticed the problem

Bojan Kovacevic Over a year ago

do you call ajax there to fetch data?

Bojan Kovacevic Over a year ago

i mean to insert data :)

GolezTrol Over a year ago

I think your test is wrong. If you have code like that, it should run sequentially. Only possible exception, is when you start forking/threading, but that is advanced territory, especially in PHP. If that happens, it happens in 'somecode', but there is no way for me to tell what happens in code you didn't post.

GolezTrol Over a year ago

Anyway, 'normal' PHP code, including database queries and such runs sequentially. No matter if you call it 1, 50 or 1000 times, those echoes will always appear in the same order.

Vikas Arora · Accepted Answer · 2014-02-18 12:09:51Z

0

I don't think so..it runs in sequential order. I got little confused so I checked myself(to calm down my heartbeat):

<?php
function a ($var) {
  echo 'a->'.$var.'<br>';
  b($var);
}

function b ($var) {
  echo 'b->'.$var.'<br>';
}

a(1);
a(2);
?>

Gives you:

a->1
b->1
a->2
b->2

phew!

answered Feb 18, 2014 at 12:09

Vikas Arora

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7 Comments

mostafa khansa Over a year ago

you may get that right when there are only 2 functions.but when there are about 10 functions with hundred of functions call, the difference will be obvious

Bojan Kovacevic Over a year ago

only async functions dont run in sequental order.

Vikas Arora Over a year ago

may be the code inside somecode is creating this type of behaviour. Even if a file has a hundred functions, it will be executed sequentially until unless there is some call to other function in between.

mostafa khansa Over a year ago

then, how to make sure that functions are not async ?

Roberto Maldonado Over a year ago

Did you use ajax? Or a multithread application that had access to your website?

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