Php if string in array

Php if string in array DEFAULT

PHP String Array

PHP String Array

PHP String Array is an array in which the elements are strings.

In this tutorial, we will learn how to create a string array, how to echo the string array to browser, how to iterate over individual strings of the array, etc.

Create PHP String Array

You can use array() function with comma strings passed as argument to it, to create an array of strings. The syntax is

$arr = array( string1, string2, string3 );

In the following program, we will create an array containing strings as elements.

PHP Program

<?php $arr = array( "apple", "banana", "cherry" ); ?>

You can use create an empty array first using array() function and then assign strings using offset. The syntax is

$arr = array(); $arr[0] = "string1"; $arr[1] = "string2";

In the following program, we will create an empty array and then assign strings as elements to it using index/offset.

PHP Program

<?php $arr = array(); $arr[0] = "apple"; $arr[1] = "banana"; $arr[2] = "cherry"; ?>

Echo String Array

You can use echo construct and impode() function to display all elements of string array to browser.

In the following example, we will display all elements of string array, separated by a single space.

PHP Program

<?php $arr = array( "apple", "banana", "cherry" ); $arrString = implode(" ", $arr); echo $arrString; ?>

Program Output

PHP String Array - Output

Iterate over Strings of String Array

To iterate over individual strings of string array, you can use foreach loop, for loop, while loop, etc.

In the following example, we will use PHP foreach loop to iterate over elements of string array.

PHP Program

<?php $arr = array( "apple", "banana", "cherry" ); foreach ($arr as $string) { echo $string; } ?>

In the following example, we will use PHP For Loop to iterate over elements of string array.

PHP Program

<?php $arr = array( "apple", "banana", "cherry" ); for ($i = 0; $i < count($arr); $i++) { echo $arr[$i]; } ?>

In the following example, we will use PHP While Loop to iterate over elements of string array.

PHP Program

<?php $arr = array( "apple", "banana", "cherry" ); $i = 0; while ( $i < count($arr) ) { echo $arr[$i]; $i++; } ?>

Conclusion

In this PHP Tutorial, we learned about String Arrays in PHP: how to create them, how to echo them and how to iterate over the strings in the array.

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in_array

(PHP 4, PHP 5, PHP 7, PHP 8)

in_array — Checks if a value exists in an array

Description

in_array(mixed, array, bool = ): bool

Parameters

The searched value.

Note:

If is a string, the comparison is done in a case-sensitive manner.

The array.

If the third parameter is set to then the in_array() function will also check the types of the in the .

Return Values

Returns if is found in the array, otherwise.

Examples

Example #1 in_array() example

The second condition fails because in_array() is case-sensitive, so the program above will display:

Example #2 in_array() with strict example

The above example will output:

1.13 found with strict check

Example #3 in_array() with an array as needle

The above example will output:

'ph' was found 'o' was found

See Also

  • array_search() - Searches the array for a given value and returns the first corresponding key if successful
  • isset() - Determine if a variable is declared and is different than null
  • array_key_exists() - Checks if the given key or index exists in the array
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To TopSours: https://www.php.net/manual/en/function.in-array.php
PHP 101 - String Functions

PHP in_array() Function

❮ PHP Array Reference

Example

Search for the value "Glenn" in an array and output some text:

<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland");

if (in_array("Glenn", $people))
  {
  echo "Match found";
  }
else
  {
  echo "Match not found";
  }
?>

Try it Yourself »

Definition and Usage

The in_array() function searches an array for a specific value.

Note: If the search parameter is a string and the type parameter is set to TRUE, the search is case-sensitive.


Syntax

in_array(search, array, type)

Parameter Values

ParameterDescription
searchRequired. Specifies the what to search for
arrayRequired. Specifies the array to search
type Optional. If this parameter is set to TRUE, the in_array() function searches for the search-string and specific type in the array.


Technical Details

Return Value:Returns TRUE if the value is found in the array, or FALSE otherwise
PHP Version:4+
PHP Changelog:PHP 4.2: The search parameter may now be an array

More Examples

Example

Using all parameters:

<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland", 23);

if (in_array("23", $people, TRUE))
  {
  echo "Match found<br>";
  }
else
  {
  echo "Match not found<br>";
  }
if (in_array("Glenn",$people, TRUE))
  {
  echo "Match found<br>";
  }
else
  {
  echo "Match not found<br>";
  }

if (in_array(23,$people, TRUE))
  {
  echo "Match found<br>";
  }
else
  {
  echo "Match not found<br>";
  }
?>

Try it Yourself »

❮ PHP Array Reference
Sours: https://www.w3schools.com/php/func_array_in_array.asp

In array if string php

How to determine if an array contains a specific value in PHP?

Given an array and a specific value, we have to determine whether the array contains that value or not. So there is two popular way to determine that the specific value is in the array or not. One procedure is using by loop and other one is in_array() function. By using loop to get the specific value present or not is time-consuming compared to in_array() function so here we will skip the loop one and use the in_array() function.
Below programs illustrate how to determine if an array contains a specific value:
Program 1: 
 

php

Output: 
 

Your element founded

Program 2: In this example the in_array function perform in strict mode, it will also check the type of array elements.
 

php

Output: 
 

not found found found

Program 3: 
 

php

Output: 
 

gfg

In the above example, the array contains string “gfg” and two numbers 1 and 17. The if statement calls in_array() function which checks if the given item as the parameter is present in the given array or not. If the function returns true, the if statement is executed.
 




My Personal Notesarrow_drop_up
Sours: https://www.geeksforgeeks.org/how-to-determine-if-an-array-contains-a-specific-value-in-php/
PHP Tutorial (1) Strings, Variables, Echo, Arrays

PHP | in_array() Function

The in_array() function is an inbuilt function in PHP. The in_array() function is used to check whether a given value exists in an array or not. It returns TRUE if the given value is found in the given array, and FALSE otherwise.

Syntax:

bool in_array ( $val, $array_name ,$mode )

Parameters: The in_array() function accepts three parameters, out of which two are compulsory and other one is optional. All three parameters are described below:

  1. $val: This is a required parameter which specifies the element or value to be searched in the given array. This parameter can be of mixed type i.e, it can be of string type or integer type, or any other type. If this parameter is of string type then the search will be performed in a case-sensitive manner.
  2. $array_name: This is a required parameter and it specifies the array in which we want to search.
  3. $mode: This is an optional parameter and is of boolean type. This parameter specifies the mode in which we want to perform the search. If it is set to TRUE, then the in_array() function searches for the value with the same type of value as specified by $val parameter. The default value of this parameter is FALSE.

Return Value: The in_array() function returns a boolean value i.e, TRUE if the value $val is found in the array otherwise it returns FALSE.
Below programs illustrate The in_array() function in PHP:

Program 1: The below program performs the search using in_array() function in non-strict mode. That is, the last parameter $mode is set to false which is it’s default value. The value to be searched is of string type whereas this value in the array is of integer type still the in_array() function returns true as the search is in non-strict mode.



 

Output:

found

Program 2: The below program performs the search using in_array() function in strict mode. That is, the last parameter $mode is set to true and the function will now also check the type of values.

 

 

 

Output:

found found not found

Reference
http://php.net/manual/en/function.in-array.php
 

PHP is a server-side scripting language designed specifically for web development. You can learn PHP from the ground up by following this PHP Tutorial and PHP Examples.




Sours: https://www.geeksforgeeks.org/php-in_array-function/

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