Array,Array Function,Get Method,Post Method
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An array is a special variable that can hold multiple values. There are two main types of arrays: numeric and associative. Numeric arrays use integers as indexes and associate arrays use named keys. Functions like in_array(), is_array(), implode(), and explode() allow you to check/manipulate arrays. The GET and POST methods are used to submit form data, with GET appending values to the URL and POST sending values via HTTP headers.
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![What is array?
•An array is a special variable, which can hold more
than one value at a time.
Syntax:
array(“string”,”string”,”string”);
Example:
$a=array(“hello”,”world”);
echo $a[0];
echo $a[1];](https://image.slidesharecdn.com/arrayvariable-151026045511-lva1-app6892/85/Array-Array-Function-Get-Method-Post-Method-1-320.jpg)
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This document provides an overview of data structures in Java, including arrays, arraylists, and hashmaps. It discusses how to create, populate, and access arrays and arraylists. It also compares the features of arrays and arraylists, and provides an example of using a hashmap to count word frequencies in a file.
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[SUMMARY
Java arrays (1)
The document discusses Java arrays. It explains that arrays allow storing a fixed number of elements of the same type. Arrays are declared with a variable name and type, and individual elements accessed via indices. Arrays are created using new and assigned a size. Elements can be accessed, iterated over using for/foreach loops, passed to methods, and operated on using utility methods in the Arrays class like sort, binarySearch, fill.
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Array,Array Function,Get Method,Post Method
- 1. What is array? •An array is a special variable, which can hold more than one value at a time. Syntax: array(“string”,”string”,”string”); Example: $a=array(“hello”,”world”); echo $a[0]; echo $a[1];
- 3. • Numeric array is used for numeric value. • The index can be assigned automatically (index always starts at 0), like this: Syntax: $array[0]; $array[1];
- 4. • Associative arrays are arrays that use named keys that you assign to them. Syntax: array(“practical"=>“value", “name keys"=>“value", “name keys"=>“value"); Example $a=array(“practical”=>”hello”,”practical1”=>”world”); echo $a[“practical”]; echo $a[“practical1”];
- 6. In_array is used for check the string is available or not in our array. Syntax. in_array(string name,variable name);
- 8. Is_array is used for check our array is array or not. Syntax: is_array(variable name);
- 9. <?php $b="hello world"; if(is_array($b)) { echo "true"."<br>"; } else { echo "false"."<br>"; } ?>
- 10. Implode is used for convert array to string. Syntax: implode(variable name); Example: <?php $c=array("hello","how","are","you"); echo implode(" ",$c)."<br>"; ?>
- 11. Explode is used for convert string to array. Syntax: explode(“first parameter”,variablename); <?Php $d="hello how are you"; $e=explode(" ",$d); Echo $e[0]; Echo $e[1]; ?>
- 12. Get : used for get a value from form. <form action=“” method="GET"> Name: <input type="text" name="name" /> Age: <input type="text" name="age" /> <input type="submit" /> </form> Output: http://www.test.com/index.html?name1=valu e1&name2=value2
- 13. Post : used for get a value from form. <form action=“” method=“post"> Name: <input type="text" name="name" /> Age: <input type="text" name="age" /> <input type="submit" /> </form> Output: http://www.test.com/index.html