Updated April 18, 2023
Introduction to PHP in_array
In PHP, in_array is defined as the function used to search the arrays for the specified values in the memory. The search variable may be the any type like string, int etc., and the function in_array() is set the parameters and passing the parameter. At the same time, set only the Boolean type of values like true or false also the search is to be case-sensitive also it will check the specified values already exists in the array or not the sub-array will also be checked the in_array function has some default methods used to be achieved in the array conditions.
Syntax
The PHP have some default methods, variables and inbuilt conditions for achieving the project requirements. An array is the sequential memory storage area for storing and retrieving the numbers in the list not only for accepting the numbers, but it may also be the string types.
<? php
$variable name=array('','',…);
using conditional statements like if(in_array('',$variable name))
{
----some php codes based on the requirements---
}
?>For the above codes, we used in_array as the default method for iterating the looping conditions based on the specific values; it may be the any user-defined types the conditional statement may be terminated once the looping conditions is false.
How in_array Method Works in PHP?
The PHP arrays have one of the main concepts in the PHP language; it includes the same set of pre-defined functions it will be used to achieve it in storing and retrieving areas of the memory. Likewise, the PHP in_array is the pre-defined function that can be used for to check the existing values in the loop statement or not; the sub-arrays also be calculated the specified values in the array list that can be already set the Boolean condition statements before that the variable data is searched in the array list it could be the any data types like int, string, float or decimal etc., but the latest version of the php only accepts this parameter as the first argument in the method before the old versions of the PHP the parameter is not used in the specified methods.
After the data value search in the array list, the value is to be considered as the set of collection or pre-defined master value of the mentioned user-defined datas. Then the data value is stored and retrieved with the some conditional statements like if, else, for etc., using these loops, the values are iterated and displayed it on the UI. The final parameter, like $strict, is the optional parameter, and this should be used to set the Boolean condition values; if the condition is true, then it’s used for to comparing the new and existing data values with specified data types. If the condition is false, it will terminate out of the loop.
Whenever the array specified values will be used for storing and retrieving in the list the conditional may be set as the true because the parent root conditions and also the master array value always contains and set it as 0 or else Boolean conditions like true/false statements sometimes the NULL value also accepts in the entry-level then the array method like in_array() will always throws some errors and return the some unexpected type of results in the UI because whenever the user is entered the datas in the UI screen is always stored on the database the UI fields may be any of the data types like int, string etc but whatever the user datas entered on the UI screen that datas only be stored on the database so that only when we retrieved the datas depends on the requirement that time the value should be showed on the screen with same type like example 4, four the array value as number type as 4 and string/character type like four so that it will return some unexpected error conditions in the application.
Examples of PHP in_array
Given below are the examples of PHP in_array:
Example #1
Code:
<!DOCTYPE html>
<html>
<body>
<?php
$abarrays = array("Siva", "Raman", "Sivaraman", "ARun","Kumar","Arunkumar", 41);
if (in_array("41", $abarrays, TRUE))
{
echo "The user definedvalue is found<br></br>";
}
else
{
echo "The user definedvalue is found<br></br>";
}
if (in_array("Kumar",$abarrays, TRUE))
{
echo "The user definedvalue is found<br></br><br>";
}
else
{
echo "The user definedvalue is found<br></br><br>";
}
if (in_array(41,$abarrays, FALSE))
{
echo "The user definedvalue is found<br></br><br>";
}
else
{
echo "The user definedvalue is found<br></br><br>";
}
if (in_array(42,$abarrays, FALSE))
{
echo "The user definedvalue is found<br></br></br>";
}
else
{
echo "The user definedvalue is found<br></br><br>";
}
if (in_array(42,$abarrays, FALSE))
{
echo "The user definedvalue is found<br></br></br>";
}
else if (in_array(41,$abarrays, TRUE))
{
echo "The user definedvalue is found<br></br></br>";
}
else
{
echo "The user definedvalue is found<br></br></br>";
}
?>
</body>
</html>Output:
Example #2
Code:
<!DOCTYPE html>
<html>
<body>
<?php
$a = 0;
$output = false;
$inputs = array(6743478, 74698793,87894379, "Siva", "sdjkj");
for ($a = 0; $a <= in_array("12345", $inputs); $a++) {
echo "The number is: $a <br>";
if(in_array("Siva", $inputs))
{
echo "The user definedvalue is found<br></br>";
}
else
{
echo "The user definedvalue is not found<br></br>";
}
}
?>
</body>
</html>Output:
Example #3
Code:
<!DOCTYPE html>
<html>
<body>
<?php
$p = 0;
$inputs = array(array('s', 'a', 't'), array('y', 'u'), 'm');
do {
echo "The number is: $p <br>";
$p++;
if(in_array("Raman", $inputs))
{
echo "The user definedvalue is found<br></br>";
}
else
{
echo "The user definedvalue is not found<br></br>";
}
}
while($p <=$inputs);
?>
</body>
</html>Output:
In the above examples, we used PHP in_array() method used with different scenarios for each loop; they will check the user-inputs conditions and the values. The pre-defined arrays method and the loop execution will be performed only by the Boolean conditions satisfied with the method.
Conclusion
In PHP, the scripting language array is the user-defined and customized functions and is also to be an important area for storing and retrieving the datas from memory. The array values will be searched using the default functions; sometimes, the search value is not fetched, or the value may be invalid, it throws the error as the output.
Recommended Articles
This is a guide to PHP in_array. Here we discuss the introduction, syntax, and working of the in_array method in PHP along with different examples and code implementation. You may also have a look at the following articles to learn more –
