Check if string contains any array value?
$search=array("<",">","!=","<=",">=")
$value="name >= vivek ";
I want to check if the $ value contains the value of any of the values in the $ search array. I can find out using foreach and strpos function. Without resorting to using foreach, can I find an answer? If yes then kindly help me to solve this problem.
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Expand $value
and convert it to an array and then use a function array_intersect()
in php to check if a string does not contain an array value. Use below code
<?php
$search=array("<",">","!=","<=",">=");
$value='name >= vivek ';
$array = explode(" ",$value);
$p = array_intersect($search,$array);
$errors = array_filter($p);
//Check if the string is not empty
if(!empty($errors)){
echo "The string contains an value of array";
}
else
{
echo "The string does not containe the value of an array";
}
?>
Check the code here http://sandbox.onlinephpfunctions.com/code/7e65faf808de77036a83e185050d0895553d8211
Hope this helps you
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Yes, but it will require you to restructure your code.
$search = array("<" => 0, ">" => 1,"!=" => 2,"<=" => 3,">=" => 4);
$value = "name => vivek ";
$value = explode(" ", $value);
foreach($value as $val) {
// search the array in O(1) time
if(isset($search[$val])) {
// found a match
}
}
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Here's a solution using array_reduce:
<?PHP
function array_in_string_callback($carry, $item)
{
list($str, $found) = $carry;
echo $str . " - " . $found . " - " . $str . " - " . $item . "<br/>";
$found |= strpos($str, $item);
return array($str, (boolean) $found);
}
function array_in_string($haystack, $needle)
{
$retVal = array_reduce($needle, "array_in_string_callback", array($haystack, false));
return $retVal[1];
}
$search=array("<",">","!=","<=",">=");
$value="name >= vivek ";
var_dump(array_in_string($value, $search));
?>
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My first wish was to solve the problem with array_walk () and callback like this:
<?php
$search=array("<",">","!=","<=",">=");
$value = "name >= vivek ";
function test($item, $key, $str)
{
if( strpos($str, $item) !== FALSE ) {
echo "$item found in \"$str\"\n";
}
}
array_walk($search, 'test', $value);
// output:
> found in "name >= vivek "
>= found in "name >= vivek "
Live demo: http://3v4l.org/6B0WX
While this solves the problem without a foreach loop, it answers the what, not yes / no. The following code directly answers the question and allows you to answer the "what" as follows:
<?php
function test($x)
{
$value="name >= vivek ";
return strpos($value, $x);
}
$search = array("<",">","!=","<=",">=");
$chars = array_filter( $search, "test" );
$count = count($chars);
echo "Are there any search chars? ", $answer = ($count > 0)? 'Yes, as follows: ' : 'No.';
echo join(" ",$chars);
// output:
Are there any search chars? Yes, as follows: > >=
Live demo: http://3v4l.org/WJQ5c
If the answer was no, then the output is "No" followed by a space.
The key difference in this second solution versus the first is that in this case there is a return result that can be manipulated. If an element in the array matches a character in the string, then array_filter adds that element to $ chars. The new count of the array elements answers the question, and the array itself contains any matches if they want to display them.
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