My advice is to start loving type checking immediately, and to familiarize yourself with the return value of the functions you are using. There is no PHP function just to check only _if_ $needle occurs in $haystack strpos() tells you if it _doesn't_ by returning false, but, if it does occur, it tells you _where_ it occurs as an integer, which is 0 (zero) if $needle is the first part of $haystack, which is why testing if (strpos($needle, $haystack)=false) is the only way to know for sure if $needle is not part of $haystack. If $needle is the last character in $haystack, and testing $needle as a boolean by itself would evaluate to false, then testing strstr() as a boolean will evaluate to false (because, if successful, strstr() returns the first occurrence of $needle along with the rest of $haystack).Īlso, strstr() is far more memory-intensive than strpos(), especially with longer strings as your $haystack, so if you are not interested in the substring that strstr() returns, you shouldn't be using it anyway. Strstr() is not a way to avoid type-checking with strpos(). I got answer by using regex with slicing but i want to achieve by using regex alone.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 strrchr Find the last occurrence of a character in a string Description strrchr ( string haystack, string needle ): stringfalse This function returns the portion of haystack which starts at the last occurrence of needle and goes until the end of haystack. regular expression to match everything until the last occurrence of /.Is their any better way to do by purely using regex? Another option is to use the pregreplace () function to replace the last. It uses the strrpos () function to determine the position of the substring’s last occurrence in a string. Note: My substring is dynamic with different padding but only number.ĭ:/me/vol101/Prod/cent/2019_04_23_01/image/AVEN_000_3400_img_pic_p1001-1010/pxy/AVEN_000_3400_img-mp4_to_MOV_v The following solution replaces the last occurrence of a substring within the source string using the substrreplace () function. Use strrpos together with substr to get the substring from the first character, up to the last occurance of the / character. Function returns an integer value of position of first occurrence of string. index.js const str 'one twothreefour' const before str.substring(0, str.lastIndexOf('')) console. strpos () function: This function is used to find the first occurrence position of a string inside another string. If your string contains multiple occurrences of the character and you need to get the substring up to the last occurrence of the character, use the String.lastIndexOf () method instead. all i want is get string before its last occurrence. Practice The substr () and strpos () function is used to remove portion of string after certain character. My substring, 1001-1010 which will occurred twice.
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