php interview questions

addcslashes -- Quote string with slashes in a C style

addslashes -- Quote string with slashes

bin2hex -- Convert binary data into hexadecimal representation

chop -- Alias of rtrim()

chr -- Return a specific character

chunk_split -- Split a string into smaller chunks

convert_cyr_string -- Convert from one Cyrillic character set to another

convert_uudecode -- Decode a uuencoded string

convert_uuencode -- Uuencode a string

count_chars -- Return information about characters used in a string

crc32 -- Calculates the crc32 polynomial of a string

crypt -- One-way string encryption (hashing)

echo -- Output one or more strings

explode -- Split a string by string

fprintf -- Write a formatted string to a stream

get_html_translation_table -- Returns the translation table used by htmlspecialchars() and htmlentities()

hebrev -- Convert logical Hebrew text to visual text

hebrevc -- Convert logical Hebrew text to visual text with newline conversion

html_entity_decode -- Convert all HTML entities to their applicable characters

htmlentities -- Convert all applicable characters to HTML entities

htmlspecialchars -- Convert special characters to HTML entities

implode -- Join array elements with a string

join -- Alias of implode()

levenshtein -- Calculate Levenshtein distance between two strings

localeconv -- Get numeric formatting information

ltrim -- Strip whitespace (or other characters) from the beginning of a string

md5_file -- Calculates the md5 hash of a given file

md5 -- Calculate the md5 hash of a string

metaphone -- Calculate the metaphone key of a string

money_format -- Formats a number as a currency string

nl_langinfo -- Query language and locale information

nl2br -- Inserts HTML line breaks before all newlines in a string

number_format -- Format a number with grouped thousands

ord -- Return ASCII value of character

parse_str -- Parses the string into variables

print -- Output a string

printf -- Output a formatted string

quoted_printable_decode -- Convert a quoted-printable string to an 8 bit string

quotemeta -- Quote meta characters

rtrim -- Strip whitespace (or other characters) from the end of a string

setlocale -- Set locale information

sha1_file -- Calculate the sha1 hash of a file

sha1 -- Calculate the sha1 hash of a string

similar_text -- Calculate the similarity between two strings

soundex -- Calculate the soundex key of a string

sprintf -- Return a formatted string

sscanf -- Parses input from a string according to a format

str_ireplace -- Case-insensitive version of str_replace().

str_pad -- Pad a string to a certain length with another string

str_repeat -- Repeat a string

str_replace -- Replace all occurrences of the search string with the replacement string

str_rot13 -- Perform the rot13 transform on a string

str_shuffle -- Randomly shuffles a string

str_split -- Convert a string to an array

str_word_count -- Return information about words used in a string

strcasecmp -- Binary safe case-insensitive string comparison

strchr -- Alias of strstr()

strcmp -- Binary safe string comparison

strcoll -- Locale based string comparison

strcspn -- Find length of initial segment not matching mask

strip_tags -- Strip HTML and PHP tags from a string

stripcslashes -- Un-quote string quoted with addcslashes()

stripos -- Find position of first occurrence of a case-insensitive string

stripslashes -- Un-quote string quoted with addslashes()

stristr -- Case-insensitive strstr()

strlen -- Get string length

strnatcasecmp -- Case insensitive string comparisons using a "natural order" algorithm

strnatcmp -- String comparisons using a "natural order" algorithm

strncasecmp -- Binary safe case-insensitive string comparison of the first n characters

strncmp -- Binary safe string comparison of the first n characters

strpbrk -- Search a string for any of a set of characters

strpos -- Find position of first occurrence of a string

strrchr -- Find the last occurrence of a character in a string

strrev -- Reverse a string

strripos -- Find position of last occurrence of a case-insensitive string in a string

strrpos -- Find position of last occurrence of a char in a string

strspn -- Find length of initial segment matching mask

strstr -- Find first occurrence of a string

strtok -- Tokenize string

strtolower -- Make a string lowercase

strtoupper -- Make a string uppercase

strtr -- Translate certain characters

substr_compare -- Binary safe optionally case insensitive comparison of 2 strings from an offset, up to length characters

substr_count -- Count the number of substring occurrences

substr_replace -- Replace text within a portion of a string

substr -- Return part of a string

trim -- Strip whitespace (or other characters) from the beginning and end of a string

ucfirst -- Make a string's first character uppercase

ucwords -- Uppercase the first character of each word in a string

vfprintf -- Write a formatted string to a stream

vprintf -- Output a formatted string

vsprintf -- Return a formatted string