How to get an array value after explode?

问题

I have passed a value from one page to another in array. I can extract first two vars by explode but I can't get the third value which is formed in an array out.

This is my array:

$user_rate=$_POST['user_rate'];//15000|ss|Array
list($total,$promo,$rate)=explode("|",$user_rate);

So I get:

$total=15000;
$promo=ss;
$rate=Array;

While Array comes from the previous page by looping the daily rate and put in an array. And I need to know what each rate is, so I wrote:

foreach($rate as $val){
echo "$val<br>";
}

But it shows nothing. How can I get this?

Updated : This is the code before the var is sent.

echo "
<tr>
<td align=\"right\" colspan=\"3\">Total</td>
<td align=\"right\"><label for=\"promo_3\"><input type=\"radio\" name=\"user_rate\" id=\"promo_3\" value=\"$ss_total|ss|$cost_ss\" />&nbsp;<u><b>".number_format($ss_total)."</b></u></label></td>
<td align=\"right\"><label for=\"promo_1\"><input type=\"radio\" name=\"user_rate\" id=\"promo_1\" value=\"$net_total|nc|$cost_nr\" checked/>&nbsp;<u><b>".number_format($net_total)."</b></u></label></td>
</tr>";

AND THIS FORMAT OF VALUE CANNOT CHANGE BECAUSE I NEED IT FOR A LATER JAVASCRIPT EXTRACT

While $cost_ss and $cost_nr are derived from database query looping.

while($rec=mysql_fetch_array($result)){
$cost_ss[]=$rec['rate_ss'];
$cost_nr[]=$rec['rate_nr'];
}

回答1:

this probably be a wrong $user_rate=$_POST['user_rate'];//15000|ss|Array

you can use serialize / unserialize for array

回答2:

You could serialize your array parameters before you pass it. Then unserialize them on the 2nd page.

$rate = serialize($rate);

On your 2nd page before you run it through the loop:

$rate = unserialize($rate);

回答3:

you can encode the values on the page as

implode("|", array($total, $promo, implode(",",$rate));

Then decode it with

list($total, $promo, $rates) = explode("|", $_POST["user_rate"]);
$rates = explode(",", $rates);

回答4:

Using serialize is definitely the key to getting this to work, but base64_encode() is the ideal way to make it less obfuscated. When you only use serialize, then you get semicolons, commas, double quotes, single quotes, and several other characters that could cause problems when you pass them through to your script that reassembles it.

For instance, after serializing an array, you will get this, like Sidux pointed out

a:3:{i:0;s:4:"toto";i:1;s:4:"titi";i:2;a:2:{i:0;s:4:"coco";i:1;s:4:"cici";}}

When you add base64_encode to the mix you will get an easier value to work with.

YTozOntpOjA7czo0OiJ0b3RvIjtpOjE7czo0OiJ0aXRpIjtpOjI7YToyOntpOjA7czo0OiJjb2NvIjtpOjE7czo0OiJjaWNpIjt9fQ==

With this, you can easily send/receive your saved array without any trimming, adding of slashes, etcetera.

Assuming you send your data this way, your new code will look like this

$user_rate=$_POST['user_rate'];//15000|ss|Array
list($total,$promo,$rate)=explode("|",$user_rate);
$rate = unserialize( base64_decode($rate) );

Now, $rate is a functional array

回答5:

ok, many answers and no luck... i'll try it again:

you have an array $rate before you submit your form:

foreach($rate as $val){
   echo "$val<br>";
}

and you want to add $ss_total and the string "ss" and submit it so you need to:

$newarray = array('rate'=>$rate, 'type'=>'ss', 'ss_total'=>$ss_total); 
// now you have a 2-dimensional array ($newarray)

// the next step is to prepare it for form-submitting (serialize and base64_encode):
$stringvalue = base64_encode(serialize($newarray));    

// ok, now you are able to submit it as radio-field-value:
echo '<input type="radio" name="user_rate" id="promo_3" value="'.$stringvalue.'" />';

when the form is submitted you get a serialized and encoded string in $_POST['user_rate'], you can do an echo if you'd like to see how it looks.

Now you need to base64_decode and unserialize:

$arr = unserialize(base64_decode($_POST['user_rate']));

and you have now full access to your array:

echo $arr['type']."<br />";

echo $arr['ss_total']."<br />";
echo $arr['rate']['index_of_rate']; // i dont know the keys of rate array...

access $arr in javascript:

echo "<script>";
echo "var jsarr = ".json_encode($arr).";\n";
echo "alert(jsarr.ss_total);\n";
echo "</script>";

I hope you get it now.

回答6:

Hi i think that i understand you probleme, when you passe and array from as string try to "serialize" it and "unserialize" it in the other page, for exemple :

$array = serialize(array('toto', 'titi', array('coco', 'cici')));

will give you somthing like this

a:3:{i:0;s:4:"toto";i:1;s:4:"titi";i:2;a:2:{i:0;s:4:"coco";i:1;s:4:"cici";}}

and if you useunserialize($array); it will give you your array back

来源：https://stackoverflow.com/questions/16817377/how-to-get-an-array-value-after-explode

标签

php

arrays

explode