• By Rasika Preethiraj
• In PHP
• Posted 21 Oct 2013

PHP arrays, explode, substr and trim - quick through

Array is kind of data structure where it stores multiple values in a single variable. you can save multiple values like in a stack by using arrays. define array in php as follows.

$arrayExample = array( value1,value2,value3);

example:

$x = array(10,20,30);

Insert data to array

$x=array();//empty array
array_push($x,1,2);
print_r($x);

output: Array ( [0] => 1 [1] => 2 )

Read from array

$numberArray = array( 10, 20, 30);
foreach( numberArray as $readvalue ) {
    print_r($readvalue);
}

explode

The function explode use to chunk/break string to an array .

$string = "number1,number2,number3";
$expldedArray = explode(",",$string);

the above example, $explodedArray has 3 elements where $string breaks by comma.

Trim

trim function allows you to remove given string or character from both sides of strings, there is another two functions called ltrim and rtrim which allows you to remove content from the exact end.

$string = “tec.icrony.net“;
echo trim($string,“tec..net“);//remove from both sides and returns icrony
echo ltrim($string,“tec.“);//returns icrony.net
echo rtrim($string,“.net“);//returns tec.icrony

Sub String

substr() can used to return a part of a string.This is very useful when you trying to extract a part of string .

$string = “tec.icrony.net“;
echo substr($string,4,6);//return icrony

for more you can refer here

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