Strings in PHP
In PHP, A String is a sequence of characters which are enclosed with single quotes or double quotes.
There are 2 ways to specify string
- Single Quotes Ex: $str=' Hello PHP ';
- Double Quotes Ex: $str=" Hello PHP ";
Where in Single quoted string, we can store multiline text, special characters and escape sequences.Where in Double quoted string, we can't use special characters directly.
☞ Double quoted string :
Example:
$age = 20;
$str1="Your age is : $age"; // string1
echo $str1;
$str2="Your age is : '$age'"; // string2
echo $str2;
Output:
Your age is : 20
Your age is : '20'
☞ Single quoted string :
Example:
$age = 20;
$str1='Your age is : $age'; //string1
echo $str1;
$str2='Your age is : "$age"'; //string2
echo $str2;
Output:
Your age is : $age
Your age is : '$age'
☞ String Function in PHP
PHP provides various string functions to perform different operations on strings i.e. to access and manipulate strings. Those are,
☞ strtolower() :
It returns string in lowercase letters i.e. it converts given string into lowercase.
Example:
$str="StudyGLANCE";
$str1=strtolower($str);
echo $str1;
Output:
studyglance
☞ strtoupper() :
It returns string in uppercase letters i.e. it converts given string into uppercase.
Example:
$str="StudyGLANCE";
$str1=strtoupper($str);
echo $str1;
Output:
STUDYGLANCE
☞ ucwords() :
It converts first character of each word in given string into uppercase.
Example:
$str="study glance";
$str1=ucwords($str);
echo $str1;
Output:
Study Glance
☞ strlen() :
It returns the length of given string.
Example:
$str="study glance";
$len=strlen($str);
echo "Length of given string : $len";
Output:
Length of given string : 12
☞ strrev() :
It returns the given string in reverse.
Example:
$str="study glance";
$str1=strrev($str);
echo $str1;
Output:
ecnalg yduts
☞ str_word_count() :
It returns the number of words in the given string.
Example:
$str="study glance";
$wc=str_word_count($str);
echo $wc;
Output:
2
☞ strpos() :
It searchs for a specific text within a string. If a match is found, this function returns the character position of the first match. If no match is found, it will return false.
Example:
$str="study glance";
$pos=strpos($str,"glance");
echo $pos;
Output:
6
☞ str_replace() :
It replaces some characters with another characters in the given string.
Example:
$str="study glance";
$str1=str_replace("glance","world",$str);
echo $str1;
Output:
study world
☞ substr() :
It returns the sub-string from the given string.
Example:
$str="study glance";
$str1=substr($str,6);
$str2=substr($str,0,4);
echo $str1;
echo $str2;
Output:
glance
study
Example: "Strfundemo.php"
Output :
