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Calling a Javascript function from within PHP

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Jan 13.2009

Hi, I am sorry if this has been covered elsewhere, but I’m still stuck after reading quite a lot of them.

Basically I’m trying to run a small javascript function from within some PHP script. Here is a very basic example of what i’m doing. (My javascript is in a separate .js file):

// Returns the day from a mySQL date string
function getDay(dateString){
day = dateString.substring(8,10);
return day;
}

———————————————–

-Then in the PHP code:

echo(“<script language=’javascript’ src=’functions.js’>getDay($date)</script>”);

Can anyone help? I realise i’m probably missing something very simple. Thanks

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PHP

6 Comments(s) ↴

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@MindzaiJan 13.2009 — PHP is a server side language and javascript is client side, so you can't call a javascript function from PHP. What you are doing in the code you posted is building the html which [b]will[/b] run the javascript when the html is executed in the browser, but by then PHP has been and gone.

Also (and i'm not a js coder particularly so I could be wrong), i dont think the javascript you posted would appear to do anythng even when run from the browser because you are not doing anything with the returned value from the program.

This should let you see the return from the js function:

<i>
</i>echo "&lt;script language='javascript' src='functions.js'&gt;&lt;/script&gt;";
echo "&lt;script language='javascript'&gt;alert(getDay($date));&lt;/script&gt;";
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@coldscooterauthorJan 13.2009 — Thanks for your post. Something definately clicked for me then.

I've solved the problem by using this simple php function:

<?php

// This function converts a string in the format returned by MySQL into dd-mm-yyyy.

function convertDate($dateString){

$day = substr($dateString,8,2);

$month = substr($dateString,5,2);

$year = substr($dateString,0,4);

$wholeDate = $day."/".$month."/".$year;

return $wholeDate;

}

?>
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@TheTeenScripterJan 13.2009 — Actually, Javascript could be used on the server end also but not many people know that
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@MindzaiJan 13.2009 — Or you could do:

[code=php]$date = date('d/m/Y', strtotime($dateString));[/code]
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@MindzaiJan 13.2009 — Actually, Javascript could be used on the server end also but not many people know that[/QUOTE]

Yes but I'm guessing the OP is talking about CSJS ?
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@TheTeenScripterJan 13.2009 — You're right, that is the case. I was just pointing it out for the hell of it ?
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