03php array string functions

8/14/2019 03PHP Array String Functions

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PHP Day 3

Geshan Manandhar

Developer,Young Innovations Pvt. Limited

www.geshanmanandhar.com

http://www.php.net


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PHP StringsPHP Strings

A string is series of characters.A string is series of characters.

In PHP, a character is the same as a byte,In PHP, a character is the same as a byte,which is exactly 256 different characterswhich is exactly 256 different characters

possible.possible.?>


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PHP StringsPHP Strings

Another ExampleAnother Example

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Important String FunctionsImportant String Functions

explode (string $delimiter, string $string)(string $delimiter, string $string)

nl2brnl2br ( string $string )( string $string )

strcmpstrcmp ( string $str1, string $str2 )( string $str1, string $str2 )

strlenstrlen ( string $string )( string $string )

strtolowerstrtolower ( string $str )( string $str )

substrsubstr ( string $string, int $start [, int( string $string, int $start [, int

$length] )$length] ) trimtrim ( string $str )( string $str )

Example code atExample code atday03\prog22_string_functions.phpday03\prog22_string_functions.php
http://localhost/php_class/day03http://localhost/php_class/day03http://localhost/php_class/day03


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ArrayArray

In computer science an array is a dataIn computer science an array is a datastructure consisting of a group of elementsstructure consisting of a group of elementsthat are accessed by indexing.that are accessed by indexing.

In most programming languages eachIn most programming languages eachelement has the same data type and theelement has the same data type and thearray occupies a contiguous area of storage.array occupies a contiguous area of storage.

Most programming languages have a built-inMost programming languages have a built-in

array data type.array data type.


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Multi-Dimensional ArrayMulti-Dimensional Array

//full code at day03\prog24_array_multi.php?> //full code at day03\prog24_array_multi.php


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Important Array Function:Important Array Function:

asortasort asort($array) Sort an array and maintainasort($array) Sort an array and maintain

index associationindex association

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push/poppush/pop array_push($array,array_push($array,

element1,)element1,)

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array_pop($array)array_pop($array)


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searchsearch array_search($array, item1, item2);array_search($array, item1, item2);

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Important Array Function :Important Array Function :

randrand array_random ($array, no_of_entries);array_random ($array, no_of_entries);?>


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reversereverse

array_reverse($array)array_reverse($array)

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mergemergearray_merge($array1, $array2);array_merge($array1, $array2);

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keyskeys array_keys($array, param)array_keys($array, param)

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Some Date examplesSome Date examples

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Important DebuggingImportant Debugging

FunctionsFunctionsprint_rprint_r

Prints human-readable information aboutPrints human-readable information abouta variablea variable

var_dumpvar_dump Dumps information about a variableDumps information about a variable

die() or exit()die() or exit() Dumps information about a variableDumps information about a variable


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The more you dig in the moreThe more you dig in the more

you find outyou find out

Find out other built in functions in PHPFind out other built in functions in PHPyourself.yourself.

Search atSearch at

www.php.netwww.php.net

for more.for more.
http://www.php.net/http://www.php.net/http://www.php.net/


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QuestionsQuestions

Put forward your queries.Put forward your queries.


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Lets get rollingLets get rolling

Print todays date like Today is: December 18, 2008Print todays date like Today is: December 18, 2008

and time is 12:10:10 PM.and time is 12:10:10 PM.

Reverse this sentence $str= PHP learn to want I Reverse this sentence $str= PHP learn to want I into a meaningful sentence, with use ofinto a meaningful sentence, with use of

array_reverse.array_reverse.

Learning PHP is not that easy and not that difficultLearning PHP is not that easy and not that difficult print it in lower and upper case with its string print it in lower and upper case with its stringlength.length.

03php array string functions

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