Start - Optional, specific where the search for the substring should begin Returns: Substring - Required, the substring that you are looking to check if the string contains String - Required, the original string that you are looking to search Syntax of stripos, strpos and strrpos //Syntax of stripos Lastly, unlike the previous methods, strrpos returns the last occurrence of the substring. However, the stripos method is case-insensitive, and if you are looking to case-sensitively check if a PHP string contains a substring you can use the strpos methods. The stripos method checks if a PHP string contains a substring, and returns the index of the first occurrence of the substring. The following methods can be used to achieve this. This method is used to check and return the index of the substring in case the PHP string contains it. To avoid such cases you could ensure that the substring used to search is in the right case, or you could use the strtolower() method. Output: PHP string does not contain 'Hire" The str_contains returns a boolean true or false and hence is often placed inside a conditional statement.Īs aforementioned, the str_contains method is case-sensitive, here is an example of the same: $string = "Hire the top 1% freelance developers" Substring - Required, the substring that you are looking to check if the PHP string contains Code & Explanation: $string = "Hire the top 1% freelance developers"Įcho "PHP string does not contain 'Hire" String - Required, the original string that you intend to search Syntax of PHP str_contians: str_contains(string, substring) Ensure that the substring used to search is in the right case, or you could use the strtolower() method. However, keep in mind that str_contains is case-sensitive. The function checks the string and returns a boolean true in case it exists and false otherwise. This method is used to check if a PHP string contains a substring. The str_contains is a new function that was introduced in PHP 8. With that out of the way let us look at all these methods in depth. However, if you are looking to check if a substring exists and to return its index, the stripos and strpos methods can be used. If you are looking to just check if a string contains a substring you can use the str_contains function. However, the methods you chose would be decided based on your use cases. The string contains (str_contains) is the most commonly used method in PHP. Subsequently, each language comes with a few methods that can be used to do the same. While writing code, it is a common practice to check if a string contains a substring. Why check if a PHP string contains a substring? PHP string contains - Limitations and Caveats.Why check if a PHP string contains a substring?.The solution is to use the strict checking option. It is completely correct behaviour, due to PHP's leniency on variable types, but in "real-life" is almost useless. Loose checking returns some crazy, counter-intuitive results when used with certain arrays. Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search
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