PHP | strchr() Function - GeeksforGeeks

The strchr() function is a built-in function in PHP and is used to search for the first occurrence of a given string(say searchStr) in another string(say originalStr) and returns the rest of the string from originalStr starting from the first occurrence of searchStr in orignalStr.

Note: The strchr() function is case sensitive.

Syntax:

strchr($originalStr, $searchStr, $before_search

Parameter:

$originalStr: This parameter specifies the string in which the word is to be searched. It is mandatory
$searchStr: It specifies the word to be searched in the given $originalStr, it can be a character or a number also, if a number is passed, it searches for the equivalent ASCII value character in the $originalStr. It is mandatory.
$before_search: This is an optional parameter which when set to True returns the part of $originalStr before the first occurrence of $searchStr. It is set to false by default.

Return Value: It returns a string depending on the below three cases:

It returns the string starting from the first occurence of the $searchStr in $originalStr to the end of the $originalStr when the $searchStr is found.
It returns nothing when the $searchStr is not present in the given $originalStr.
It returns the part of string before the first occurence of the $searchStr when $before_search is set to TRUE.

Examples:

Input : $originalStr = "geeks for geeks" 
        $searchStr = "geeks" 
Output : geeks for geeks 

Input : $originalStr = "geeks for geeks" 
        $searchStr = "for" 
Output : for geeks 

Input : $originalStr = "striver has published 180 articles"
        $searchStr = "has"    $before_search = TRUE
Output :  striver
 
Input: $originalStr = "geeks for geeks" $searchStr = "gfg" 
Output: No output

Below programs illustrate the strchr() function in PHP:

Program 1: Program to demonstrate strchr() fucntion when word is found.

<?php 
// Program to demonstrate the chr()  
// function when word is found  
$originalStr = "geeks for geeks";  
$searchStr = "geeks" ; 
  
// prints the string from the  
// first occurence of the $searchStr 
echo strchr($originalStr, $searchStr); 
?> 

Output:

geeks for geeks

Program 2: Program to demonstrate strchr() fucntion when word is not found.

<?php 
// Program to demonstrate the chr()  
// function when word is not found  
$originalStr = "geeks for geeks";  
$searchStr = "gfg" ; 
  
// prints the string from the  
// first occurence of the $searchStr 
echo strchr($originalStr, $searchStr); 
?> 

Output:

No Output

Program 3: Program to demonstrate strchr() fucntion when word is found and $before_search is set to true.

<?php 
// Program to demonstrate the chr()  
// function when word is found and 
// $before_search is set to true  
$originalStr = "geeks for geeks";  
$searchStr = "for" ; 
  
// prints the string from the  
// first occurence of the word 
echo strchr($originalStr, $searchStr, true); 
?> 

Output:

geeks

Program 4: Program to demonstrate strchr() fucntion when a part of word is passed and found.

<?php 
// Program to demonstrate the chr()  
// function when a part of word is passed and found 
$originalStr = "geeks for geeks";  
$searchStr = "eks" ; 
  
// prints the string from the 
// first occurence of the word 
echo strchr($originalStr, $searchStr); 
?> 

Output:

eks for geeks

Program 5: Program to demonstrate strchr() fucntion when a number is passed and its equivalent ASCII character is searched.

<?php 
// Program to demonstrate the chr()  
// function when a number is passed and its equivalent 
// ASCII character is searched 
  
$originalStr = "geeks for geeks";  
  
// 101 is the ASCII value of e  
$searchStr = 101 ; 
  
echo strchr($originalStr, $searchStr); 
?> 

Output:

eeks for geeks

Reference:
http://php.net/manual/en/function.strchr.php

My Personal Notes

Aug	SEP	Oct
	23
2018	2019	2020

Suggest a Topic

Recommended Posts: