PHP - Strings

PHP string is sequences of characters, like "Hello, i am very good in php".

The following are valid examples of string

<?php
$string_1 = "String one";
$string_2 = "String sequences of characters";
?>

Single-quoted strings are treated almost literally, and double-quoted strings change the variable with their values

<?php

$string_1 = "String one";
$string_2 = "String sequences of characters";

//Single-quoted
$literally = 'My $string_1 will not print!\\n';


//Single-quoted will not print
$double_quoted = 'My $string_2 will  print!\\n';

//// Concatenation Of two String 
$concatenation = "My " . $string_1 . " will  print!\\n";

echo $literally . "\n";
echo $double_quoted . "\n";
echo $concatenation . "\n";
?>

output:

Concatenation Of two String 

he first is the concatenation operator ('. '), which returns the concatenation of its right and left arguments. The second is the concatenating assignment operator (' . = '), which appends the argument on the right side to the argument on the left side.

To concatenate two string variables together, use the dot (.) operator −

#test.php

<?php

$string_1 = "String one";
$string_2 = "too";


//Concatenation Of two String 
$concatenation = "My " . $string_1 . " will  print and Second print ".$string_2;

echo $concatenation;
?>

output:

PHP strlen() function

The strlen() function is used to find the length of a string.

<?php
   echo strlen("Hello world!");
?>

output:

PHP strpos() function

The strpos() function is used to search for a String or character within a string .

<?php
   echo strpos("Hello world!","wo");
?>

output: