I purchased modalbox plugin from envato market place made in javascript i want to use it to implement my categories> subcategories> items. Anyhow i know JavaScript variable can be assigned a value using php however i need the opposite.
On my first step i let the user pick a category using basic links then onclick even takes them to second slide where i want to display the subcategories and items related to this category that was selected.
I tried two things:
1) setting onClick = "step2();<?php $chosen_cat = ' . $this->db->escape(trim($category)) . '?>"
Hoping i can simply assign the name of the selected category to a value and then just use $chosen_cat in step2() javascript method to display products however this breaks the javascript as there is a conflict in output;
2) I changed step2() to step2(category) and then used, onclick="step2(db->escape($category););" this passes the value to the step2() method however now i would need to call <-- I would need to print out that string to php however i have no idea how to solve this considering PHP -> JS is viable as its server to client relation but back..
The $this->db->escape() is a .html codeigniter method.
My code:
<script type="text/javascript">
function step1() {
modalbox.show(new Element("div").insert(
new Element("p", { "align": "justify" }).insert(
<?php
$categories = $items;
$chosen_cat = '';
?>
<?php
$i = 0;
foreach($categories as $category => $itemarray) {
$i++;
if($i==27){
echo $this->db->escape('<a class="category" onclick="step2();<?php $chosen_cat = ' . $this->db->escape(trim($category)) . '?>" href="#">'. trim($category) . '</a>');
}
else {
echo $this->db->escape('<a class="category" onclick="step2();" href="#">' . trim($category) . '</a>') . '+';
}
}
?>
)
), {
"title" : "Step 1/3",
"width" : 800,
"options" : [{
"label" : "Next »",
"onClick" : step2
}]
});
};
function step2() {
alert(<?php $this->db->escape($chosen_cat); ?>);
modalbox.show([ new Element("div").insert(
new Element("p", { "align": "justify" }).insert(
"If you open a modalbox when another one is opened, it will stretch to the new " +
"modalbox width and height and overwrite the content.<br /\><br /\>" +
"You can use HTML or Prototype Elements like a DIV or a TABLE."
)
),
new Element("p", { "align": "justify" }).insert(
"You can have multiple contents on a single modalbox by using an array like this:<br /\><br /\>" +
"<pre>modalbox.show([ content1, content2, ... ], options);</pre>"
)
], {
"title" : "Step 2/3",
"width" : 800,
"options" : [{
"label" : "« Previous",
"onClick" : step1
}, {
"label" : "Next »",
"onClick" : step3
}]
});
};
function step3() {
modalbox.show([ new Element("div").insert(
new Element("p", { "align": "justify" }).insert(
"If you open a modalbox when another one is opened, it will stretch to the new " +
"modalbox width and height and overwrite the content.<br /\><br /\>" +
"You can use HTML or Prototype Elements like a DIV or a TABLE."
)
),
new Element("p", { "align": "justify" }).insert(
"You can have multiple contents on a single modalbox by using an array like this:<br /\><br /\>" +
"<pre>modalbox.show([ content1, content2, ... ], options);</pre>"
)
], {
"title" : "Step 3/3",
"width" : 800,
"hideOnPageClick": false,
"options" : [{
"label" : "« Previous",
"onClick" : step2
}, {
"label" : "Finish",
"isDefault" : true,
"onClick" : modalbox.hide
}]
});
};
</script>
Would it be possible to set a session variable with JavaScript in the onclick event say $_SESSION['category'] = 'category' in js style and then read that session with php and unset it i dont think this would create much of a security problem as session would exist for prolly less than a second.
I purchased modalbox plugin from envato market place made in javascript i want to use it to implement my categories> subcategories> items. Anyhow i know JavaScript variable can be assigned a value using php however i need the opposite.
On my first step i let the user pick a category using basic links then onclick even takes them to second slide where i want to display the subcategories and items related to this category that was selected.
I tried two things:
1) setting onClick = "step2();<?php $chosen_cat = ' . $this->db->escape(trim($category)) . '?>"
Hoping i can simply assign the name of the selected category to a value and then just use $chosen_cat in step2() javascript method to display products however this breaks the javascript as there is a conflict in output;
2) I changed step2() to step2(category) and then used, onclick="step2(db->escape($category););" this passes the value to the step2() method however now i would need to call <-- I would need to print out that string to php however i have no idea how to solve this considering PHP -> JS is viable as its server to client relation but back..
The $this->db->escape() is a http://codeigniter./user_guide/database/queries.html codeigniter method.
My code:
<script type="text/javascript">
function step1() {
modalbox.show(new Element("div").insert(
new Element("p", { "align": "justify" }).insert(
<?php
$categories = $items;
$chosen_cat = '';
?>
<?php
$i = 0;
foreach($categories as $category => $itemarray) {
$i++;
if($i==27){
echo $this->db->escape('<a class="category" onclick="step2();<?php $chosen_cat = ' . $this->db->escape(trim($category)) . '?>" href="#">'. trim($category) . '</a>');
}
else {
echo $this->db->escape('<a class="category" onclick="step2();" href="#">' . trim($category) . '</a>') . '+';
}
}
?>
)
), {
"title" : "Step 1/3",
"width" : 800,
"options" : [{
"label" : "Next »",
"onClick" : step2
}]
});
};
function step2() {
alert(<?php $this->db->escape($chosen_cat); ?>);
modalbox.show([ new Element("div").insert(
new Element("p", { "align": "justify" }).insert(
"If you open a modalbox when another one is opened, it will stretch to the new " +
"modalbox width and height and overwrite the content.<br /\><br /\>" +
"You can use HTML or Prototype Elements like a DIV or a TABLE."
)
),
new Element("p", { "align": "justify" }).insert(
"You can have multiple contents on a single modalbox by using an array like this:<br /\><br /\>" +
"<pre>modalbox.show([ content1, content2, ... ], options);</pre>"
)
], {
"title" : "Step 2/3",
"width" : 800,
"options" : [{
"label" : "« Previous",
"onClick" : step1
}, {
"label" : "Next »",
"onClick" : step3
}]
});
};
function step3() {
modalbox.show([ new Element("div").insert(
new Element("p", { "align": "justify" }).insert(
"If you open a modalbox when another one is opened, it will stretch to the new " +
"modalbox width and height and overwrite the content.<br /\><br /\>" +
"You can use HTML or Prototype Elements like a DIV or a TABLE."
)
),
new Element("p", { "align": "justify" }).insert(
"You can have multiple contents on a single modalbox by using an array like this:<br /\><br /\>" +
"<pre>modalbox.show([ content1, content2, ... ], options);</pre>"
)
], {
"title" : "Step 3/3",
"width" : 800,
"hideOnPageClick": false,
"options" : [{
"label" : "« Previous",
"onClick" : step2
}, {
"label" : "Finish",
"isDefault" : true,
"onClick" : modalbox.hide
}]
});
};
</script>
Would it be possible to set a session variable with JavaScript in the onclick event say $_SESSION['category'] = 'category' in js style and then read that session with php and unset it i dont think this would create much of a security problem as session would exist for prolly less than a second.
Share Improve this question edited Oct 19, 2012 at 17:05 Sterling Duchess asked Oct 19, 2012 at 16:56 Sterling DuchessSterling Duchess 2,12016 gold badges53 silver badges95 bronze badges 2- 2 PHP happens on the server side. Javascript happens on the client side. You can't output executable PHP from javascript. It's impossible. You can use AJAX to achieve the effect you want, or pre-populate the javascript with all the data you need. – Ben Lee Commented Oct 19, 2012 at 16:58
-
The code sample you have is calling
$this->db->escape('<a class="category" onclick="step2()on hardcoded HTML, that doesn't make sense, why are you db escaping HTML? I'm pretty sure the escape is for protecting against SQL injection – Ruan Mendes Commented Oct 19, 2012 at 18:09
1 Answer
Reset to default 6JavaScript is never going to set a PHP variable. JavaScript runs on the client and PHP on the server. If you need to change something on the server from JS, you have to use AJAX, or send a regular HTTP request.
Alternatively, you can have PHP generate the data that is needed at runtime on the client, usually by printing some JSON to bee a JS variable
In your example, you would need something like the following (I'll use jQuery for simplicity)
... onclick="$.ajax('/category.php').done(function(data) {step2(data.category);})"
Which would be much nicer if it weren't JS within HTML
$('#my-button').click(function(){
$.ajax('/category.php').done(function(data) {
step2(data.category);
});
});
I can't give you an AJAX tutorial, but the main thing is that you'll make an AJAX request when you need data from the server.