What is strstr () in PHP?

Question

Return Value:Returns the portion of string, or FALSE if the string to search for is not found.Changelog:Since PHP 7.3.0, passing an integer as search parameter has been deprecated.Version:PHP 4+

Table of Contents Show

Description
PHP: Tips of the Day
What is the function of strstr in PHP?
What is difference between strstr () and Stristr () in PHP?
What is the difference between strstr () and Stristr () How is it possible to remove escape characters from a string?
How to check if a string contains a substring in PHP?

Syntax

The basic syntax of the strstr() function is given with:

strstr(string, search, before_search);

The following example shows the strstr() function in action.

Tip: If you simply want to find out if a particular substring occurs within a string or not, use the faster and less memory intensive function strpos() instead.

Parameters

The strstr() function accepts the following parameters.

ParameterDescriptionstringRequired. Specifies the string to search.searchRequired. Specifies the string to search for.before_searchOptional. If set to true, it returns the part of the string before the first occurrence of the search string. Default value is

0 which returns all of the string after the first occurrence of the search string (including search string itself).

Home
PHP Home
PHP function Reference
▼String
addcslashes
addslashes
bin2hex
chop
chr
chunk_split
convert_cyr_string
convert_uudecode
convert_uuencode
count_chars
crc32
crypt
explode
fprintf
get_html_ translation_ table
hebrev
html_entity_decode
htmlentities
htmlspecialchars_ decode
htmlspecialchars
implode
join
ltrim
md5_file
md5
metaphone
nl2br
number_format
ord
parse_str
print
printf
quoted_printable_ decode
quotemeta
rtrim
sha1_file
sha1
similar_text
sprintf
sscanf
str_repeat
str_shuffle
str_split
str_word_count
strcasecmp
strchr
strcmp
strcoll
strcspn
strip_tags
stripcslashes
stripos
strlen
strnatcmp
strncasecmp
strncmp
strrchr
strrev
strripos
strrpos
strspn
strstr
strtolower
strtoupper
strtr
substr_compare
substr_count
substr_replace
substr
trim
ucfirst
ucwords
vfprintf
vprintf
wordwrap

PHP: strstr() functionLast update on August 19 2022 21:50:39 (UTC/GMT +8 hours)

Description

The strstr() function is used to get the first occurrence of a string inside another string.

This function is case-sensitive.

Version:

(PHP 4 and above)

Syntax:

strstr(string_name, search_string, before_search)

Parameters:

NameDescriptionRequired /
OptionalTypestring_nameThe input string.RequiredStringsearch_stringThe string to search for.RequiredMixed*before_searchReturns the part of the string_name before the first occurrence of the search_string when true.OptionalBoolean

*Mixed: Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value:

The portion of the string, or false if search_string is not found.

Value Type: String.

Pictorial Presentation

Example:

<?php
$string1="W3RESOURCE.COM";
$newstring=strstr($string1,".");
echo $newstring;
?>

Output:

.COM

View the example in the browser

PHP: Tips of the Day

PHP - Using braces with dynamic variable names in PHP

Wrap them in {}:

${"file" . $i} = file($filelist[$i]);

Working Example

Using ${} is a way to create dynamic variables, simple example:

${'a' . 'b'} = 'hello there';
echo $ab; // hello there

Ref : https://bit.ly/2XPoYGJ

Weekly Trends
Java Basic Programming Exercises
SQL Subqueries
Adventureworks Database Exercises
C# Sharp Basic Exercises
SQL COUNT() with distinct
JavaScript String Exercises
JavaScript HTML Form Validation
Java Collection Exercises
SQL COUNT() function
SQL Inner Join
JavaScript functions Exercises
Python Tutorial
Python Array Exercises
SQL Cross Join
C# Sharp Array Exercises

What is the function of strstr in PHP?

The strstr() function searches for the first occurrence of a string inside another string. Note: This function is binary-safe. Note: This function is case-sensitive. For a case-insensitive search, use stristr() function.

What is difference between strstr () and Stristr () in PHP?

The stristr() is a case-insensitive function which is similar to the strstr(). Both functions are used to search a string inside another string. The only difference between them is that stristr() is case-insensitive whereas strstr() is case-sensitive function.

What is the difference between strstr () and Stristr () How is it possible to remove escape characters from a string?

Difference between stristr() and strstr() functions in PHP Strings can be searched and modified. Both of these PHP functions strstr() and stristr() are used to search a string inside another string. strstr() Method: The strstr() method is used to search the string inside another string in a case-insensitive manner.

How to check if a string contains a substring in PHP?

To check if a PHP string contains a substring, you can use the strpos($string, $substring) function. If the string contains the substring, strpos() will return the index of the first occurrence of the substring in the string and "false" otherwise. In PHP, indexes start at 0.