I'm looking for a fast way to turn an associative array in to a string. Typical structure would be like a URL query string but with customizable separators so I can use '&' for xhtml links or '&' otherwise.
My first inclination is to use foreach but since my method could be called many times in one request I fear it might be too slow.
<?php
$Amp = $IsXhtml ? '&' : '&';
$Parameters = array('Action' => 'ShowList', 'Page' => '2');
$QueryString = '';
foreach ($Parameters as $Key => $Value)
$QueryString .= $Amp . $Key . '=' . $Value;
Is there a faster way?
This question is related to
php
arrays
query-string
associative-array
implode
If you're not concerned about the exact formatting however you do want something simple but without the line breaks of print_r you can also use json_encode($value) for a quick and simple formatted output. (note it works well on other data types too)
$str = json_encode($arr);
//output...
[{"id":"123","name":"Ice"},{"id":"234","name":"Cake"},{"id":"345","name":"Pie"}]
A one-liner for creating string of HTML attributes (with quotes) from a simple array:
$attrString = str_replace("+", " ", str_replace("&", "\" ", str_replace("=", "=\"", http_build_query($attrArray)))) . "\"";
$attrArray = array("id" => "email",
"name" => "email",
"type" => "email",
"class" => "active large");
echo str_replace("+", " ", str_replace("&", "\" ", str_replace("=", "=\"", http_build_query($attrArray)))) . "\"";
// Output:
// id="email" name="email" type="email" class="active large"
What about this shorter, more transparent, yet more intuitive with array_walk
$attributes = array(
'data-href' => 'http://example.com',
'data-width' => '300',
'data-height' => '250',
'data-type' => 'cover',
);
$args = "";
array_walk(
$attributes,
function ($item, $key) use (&$args) {
$args .= $key ." = '" . $item . "' ";
}
);
// output: 'data-href="http://example.com" data-width="300" data-height="250" data-type="cover"
This is my solution for example for an div data-attributes:
<?
$attributes = array(
'data-href' => 'http://example.com',
'data-width' => '300',
'data-height' => '250',
'data-type' => 'cover',
);
$dataAttributes = array_map(function($value, $key) {
return $key.'="'.$value.'"';
}, array_values($attributes), array_keys($attributes));
$dataAttributes = implode(' ', $dataAttributes);
?>
<div class="image-box" <?= $dataAttributes; ?> >
<img src="http://example.com/images/best-of.jpg" alt="">
</div>
echo implode(",", array_keys($companies->toArray()));
$companies->toArray() --
this is just in case if your $variable is an object, otherwise just pass $companies.
That's it!
My solution:
$url_string = http_build_query($your_arr);
$res = urldecode($url_string);
As an aside, I was in search to find the best way to implode an associative array but using my own seperators etc...
So I did this using PHP's array_walk() function to let me join an associative array into a list of parameters that could then be applied to a HTML tag....
// Create Params Array
$p = Array("id"=>"blar","class"=>"myclass","onclick"=>"myJavascriptFunc()");
// Join Params
array_walk($p, create_function('&$i,$k','$i=" $k=\"$i\"";'));
$p_string = implode($p,"");
// Now use $p_string for your html tag
Obviously, you could stick that in your own function somehow but it gives you an idea of how you can join an associative array using your own method. Hope that helps someone :)
This is my solution for example for an div data-attributes:
<?
$attributes = array(
'data-href' => 'http://example.com',
'data-width' => '300',
'data-height' => '250',
'data-type' => 'cover',
);
$dataAttributes = array_map(function($value, $key) {
return $key.'="'.$value.'"';
}, array_values($attributes), array_keys($attributes));
$dataAttributes = implode(' ', $dataAttributes);
?>
<div class="image-box" <?= $dataAttributes; ?> >
<img src="http://example.com/images/best-of.jpg" alt="">
</div>
As an aside, I was in search to find the best way to implode an associative array but using my own seperators etc...
So I did this using PHP's array_walk() function to let me join an associative array into a list of parameters that could then be applied to a HTML tag....
// Create Params Array
$p = Array("id"=>"blar","class"=>"myclass","onclick"=>"myJavascriptFunc()");
// Join Params
array_walk($p, create_function('&$i,$k','$i=" $k=\"$i\"";'));
$p_string = implode($p,"");
// Now use $p_string for your html tag
Obviously, you could stick that in your own function somehow but it gives you an idea of how you can join an associative array using your own method. Hope that helps someone :)
function array_to_attributes ( $array_attributes )
{
$attributes_str = NULL;
foreach ( $array_attributes as $attribute => $value )
{
$attributes_str .= " $attribute=\"$value\" ";
}
return $attributes_str;
}
$attributes = array(
'data-href' => 'http://example.com',
'data-width' => '300',
'data-height' => '250',
'data-type' => 'cover',
);
echo array_to_attributes($attributes) ;
What about this shorter, more transparent, yet more intuitive with array_walk
$attributes = array(
'data-href' => 'http://example.com',
'data-width' => '300',
'data-height' => '250',
'data-type' => 'cover',
);
$args = "";
array_walk(
$attributes,
function ($item, $key) use (&$args) {
$args .= $key ." = '" . $item . "' ";
}
);
// output: 'data-href="http://example.com" data-width="300" data-height="250" data-type="cover"
One way is using print_r(array, true) and it will return string representation of array
As an aside, I was in search to find the best way to implode an associative array but using my own seperators etc...
So I did this using PHP's array_walk() function to let me join an associative array into a list of parameters that could then be applied to a HTML tag....
// Create Params Array
$p = Array("id"=>"blar","class"=>"myclass","onclick"=>"myJavascriptFunc()");
// Join Params
array_walk($p, create_function('&$i,$k','$i=" $k=\"$i\"";'));
$p_string = implode($p,"");
// Now use $p_string for your html tag
Obviously, you could stick that in your own function somehow but it gives you an idea of how you can join an associative array using your own method. Hope that helps someone :)
If you're not concerned about the exact formatting however you do want something simple but without the line breaks of print_r you can also use json_encode($value) for a quick and simple formatted output. (note it works well on other data types too)
$str = json_encode($arr);
//output...
[{"id":"123","name":"Ice"},{"id":"234","name":"Cake"},{"id":"345","name":"Pie"}]
My solution:
$url_string = http_build_query($your_arr);
$res = urldecode($url_string);
A one-liner for creating string of HTML attributes (with quotes) from a simple array:
$attrString = str_replace("+", " ", str_replace("&", "\" ", str_replace("=", "=\"", http_build_query($attrArray)))) . "\"";
$attrArray = array("id" => "email",
"name" => "email",
"type" => "email",
"class" => "active large");
echo str_replace("+", " ", str_replace("&", "\" ", str_replace("=", "=\"", http_build_query($attrArray)))) . "\"";
// Output:
// id="email" name="email" type="email" class="active large"
This is the most basic version I can think of:
public function implode_key($glue = "", $pieces = array())
{
$keys = array_keys($pieces);
return implode($glue, $keys);
}
function array_to_attributes ( $array_attributes )
{
$attributes_str = NULL;
foreach ( $array_attributes as $attribute => $value )
{
$attributes_str .= " $attribute=\"$value\" ";
}
return $attributes_str;
}
$attributes = array(
'data-href' => 'http://example.com',
'data-width' => '300',
'data-height' => '250',
'data-type' => 'cover',
);
echo array_to_attributes($attributes) ;
echo implode(",", array_keys($companies->toArray()));
$companies->toArray() --
this is just in case if your $variable is an object, otherwise just pass $companies.
That's it!
This is the most basic version I can think of:
public function implode_key($glue = "", $pieces = array())
{
$keys = array_keys($pieces);
return implode($glue, $keys);
}
One way is using print_r(array, true) and it will return string representation of array
Source: Stackoverflow.com