[SOLVED] Array_search/In_array problem

[coldkill]

Hello.

I'm currently have a problem searching an array created by the explode function. The original string comes from a file and is then exploded with a newline separator. Anyway the problem seems to be that nothing is returned from the function. Not even False or 0. Here's the code.

define( "ERROR_SET", "DBC2" );

/*
*	Get the error file
*/
$error_file = 'source/data/display/error.cfdat';

$f = fopen( $error_file, "r" );

$contents = fread( $f, filesize( $error_file ) );

/*
*	Seperate the list
*/
$list = explode( "\n", $contents );

/*
*	Search the list for the error code
*/	
$error = in_array( ERROR_SET, $list );

echo $error;

 

Any ideas?

Thanks for the help.

Cold

[Wuhtzu]

Well, you print the return value of the in_array() function which is TRUE on success and FALSE on error. I did a simple test and these are the results:

 

This displays "1" in my browser

<?php
$array = array('a','b','c','d');

$in_array_return_value = in_array('a',$array);

echo $in_array_return_value;
?>

 

This displays "" (nothing) in my browser

<?php
$array = array('a','b','c','d');

$in_array_return_value = in_array('asdf',$array);

echo $in_array_return_value;
?>

 

So it seems like printing the return value will display 1 for true and nothing false.... So in your case your case the error you are looking for does not exist in the array, therefore false is returned and nothing is printed to the screen or ERROR_SET isn't defined properly...

[Barand]

try something like

 

echo (in_array( ERROR_SET, $list )) ? 'FOUND' : 'NOT FOUND';

[Wuhtzu]

Which is the same as:

 

<?php

if(in_array(ERROR_SET, $list)) {
    echo "Found";
}
else {
    echo "Not found";
}
?>

 

in case you didn't know.

[coldkill]

Ok the main point was the Array_search function which returns nothing for this yet works fine for a normal array. Any ideas?

[Wuhtzu]

It is kind of weird to have something which is not being mentioned once to be the main point.

 

array_search() does not appear in your code and you do not speak about it in your topic. Where in your code do you use array_search() and what is a normal array compared to the array (which array?) you are talking about?

 

 

[coldkill]

I changed in_array() for array_search(). My original code used the array_search function to find the array key for the object found. Exactly the same usage though using the $list array.

 

Cold

[coldkill]

Also just a note. I tried printing the result from the in_array function and it displayed nothing.

[teng84]

i guess the prob is the coder not php

try

http://www.php.net/manual/en/function.in-array.php that explains this issue

 

the example given are good so i dont know why its not working for you

[coldkill]

Actually I've read that quite a few times to see if it could help me further. It hasn't. The code still does not work and still returns nothing.

[teng84]

did you already use print_r for that to see if your array is an array and has a value

[coldkill]

Yep. The array does exist and contains the values it should from the file. Here is what was returned:

Array ( 
[0] => DBC1; Unable to connect to database; An attempt to establish a connection to the database has failed 
[1] => DBC2; Unable to select database; An attempt to select the database has failed 
[2] => DBC3; Connection not established; A connection has not been established to the database yet 
[3] => DBC4; Connection timed out; The connection to the database has been closed prematurely 
[4] => DBQ1; Query not valid; The query requested cannot be executed 
[5] => S1; Style not set; There is an error with the style settings 
[6] => SP1; Page does not exist; Error 404, the page requested does not exist 
[7] => SP2; Malformed Page Entry; The page entry is malformed and cannot be displayed 
)

 

Ok I've figured out why it's not working now. It's searching the entire value from the array instead of searching within it.

[Barand]

Alter the array to be

$list = array ( 
'DBC1' = 'Unable to connect to database; An attempt to establish a connection to the database has failed' ,
'DBC2' = 'Unable to select database; An attempt to select the database has failed' ,
'DBC3' = 'Connection not established; A connection has not been established to the database yet' ,

etc
);

 

Then you just need to do

$srch = 'DBC2';
if (isset($list[$srch]))
    // EXISTS
else
   // NOT EXISTS

[coldkill]

Only problem is the data is coming from a file not an array function. I guess I'll have to work something out for it. Thanks for your help all.

[coldkill]

Ok final product for anyone who would like to know. Since I'm not using PHP 5 I've had to use a for control structure to create an array with the keys and values from the file.

 

<?PHP
define( "ERROR_SET", "DBC2" );

/*
*	Get the error file
*/
$error_file = 'source/data/display/error.cfdat';

$f = fopen( $error_file, "r" );

$contents = fread( $f, filesize( $error_file ) );

/*
*	Seperate the list
*/
$array = explode( ":;\n", $contents );
$list = explode( "\n", $array[1] );
$codes = explode( ":", $array[0] );

for( $i = 0; $i < count( $codes ); $i++ )
{
$error[$codes[$i]] = $list[$i];
}

/*
*	Search the list for the error code
*/	
if( array_key_exists( ERROR_SET, $error ) )
{
//found
}
else
{
//not found
}

?>

 

Thanks for all the help.

Cold