乔巴大人

STRING MANAGEMENT
Check whether it is a string

JAVASCRIPT

typeof(custom_string1)==”string”

PHP

is_string(custom_string1);

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Return length of string

JAVASCRIPT

custom_string1.length

PHP

strlen(custom_string1);

======================

From Ascii custom_number return its char and vice versa

JAVASCRIPT

String.fromCharCode(custom_fromNum)
custom_fromChar.charCodeAt(0)

fromCharCode is invoked using the String constructor as such, namely with a capital S.

charCodeAt requires a string concatenated to it by a dot; pass its argument as zero to mean you want the code of the first char in the string, example:
“y”.charCodeAt(0)

PHP

chr(custom_fromNum);
ord(custom_fromChar);

=====================

Convert to upper or lower case a string

JAVASCRIPT

custom_string1.toLowerCase()
custom_string1.toUpperCase()

PHP

strtolower(custom_string1);
strtoupper(custom_string1);

=======================

Return numerical index of the first instance of a substring position within a wider string

JAVASCRIPT

custom_string1.indexOf( custom_string2, custom_fromNum )

Upon failure (string 2 not present within custom_string1, returns -1)

To make is case insensitive:
custom_string1.toLowerCase().indexOf( custom_string2.toLowerCase(), custom_fromNum )

PHP

strpos( custom_string1, custom_string2, custom_fromNum );

Upon failure (string 2 not present within custom_string1, returns false; since false is the same as zero -fisrt position in the string- to check whether strpos has returned false, do not use comparison check == but the identity check: === namely if
strpos(blabla)===false )

To make it case insensitive use:
stripos( custom_string1, custom_string2, custom_fromNum );
note the i: stripos

==========================

Find the char at a given numerical index

JAVASCRIPT

custom_string1.charAt(custom_number)

PHP

substr(custom_string1, custom_number, 1);

$custom_string1[custom_number];
php, unlike javascript, allows for addressing a string like an array of chars too, that is through square brackets indexing of the string itself.

Return numerical index of the last instance of a substring position within a wider string

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JAVASCRIPT

custom_string1.lastIndexOf( custom_string2, custom_fromNum )

Upon failure (string 2 not present within custom_string1, returns -1)

To make is case insensitive:
custom_string1.toLowerCase().lastIndexOf( custom_string2.toLowerCase(), custom_fromNum )

PHP

For Php 5 onward you can use:
strrpos(custom_string1, custom_string2, custom_fromNum);
Upon failure returns boolean false, to discriminate it from zero use for comparisons the === operator.
The case insensitive version is:
strripos(custom_string1, custom_string2, custom_fromNum);
note the i in the function name.

=================================

Return substring

JAVASCRIPT

custom_string1.substring( custom_fromNum, toNum )
custom_string1.substr( custom_fromNum, length )

PHP

substr( custom_string1, custom_fromNum, (toNum-custom_fromNum) );
substr( custom_string1, custom_fromNum, custom_lengthOfItem);

PHP

substr( custom_string1, custom_fromNum, custom_lengthOfItem );

JAVASCRIPT

custom_string1.substr(custom_fromNum, length)

custom_string1.substring( custom_fromNum, (custom_fromNum+length) )

PHP

strstr( custom_string1, custom_string2 );

JAVASCRIPT

custom_string1.substring( custom_string1.indexOf(custom_string2) )

============================

Split a string

JAVASCRIPT

custom_string1.split(stringSplitter)

PHP

explode(stringSplitter, custom_string1);

explode does not accept an empty splitter such as “” in php, though javascript would accept it. To split by an empty splitter, use in PHP

preg_split( “//”, custom_string1);
the two forward slashes are the delimiters of a regular expression, and encapsulating in this case nothing they amount to an empty splitter.

Note that with preg_split the hidden chars such as those of starting line or new line are included, therefore the first entry [0] of the returned splitted array would be an empty slot. Any break of line would then be reflected as two apparently “empty” returned array slots, one for the carriage return hidden char, the other for the new line hidden char.

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Replace instances in a string

JAVASCRIPT

custom_string1.replace( custom_findThis, custom_replaceWithThis )

custom_string1.replace( custom_regularExpression, custom_replaceWithThis )

PHP

str_replace( custom_findThis, custom_replaceWithThis, custom_string1 );
this function replaces all instances.

preg_replace( custom_regularExpression, custom_replaceWithThis, custom_string1 );

custom_regularExpression must be in between quotes, unlike JAVASCRIPT
“/regexp here/”

PHP

substr_replace( custom_string1, custom_replaceWithThis, custom_fromNumIndex, custom_lengthOfItem );

JAVASCRIPT

custom_string1.replace( custom_string1.substring( custom_fromNumIndex, (custom_fromNumIndex+length) ), custom_replaceWithThis )

==================================

Strip Tags from a String

JAVASCRIPT

In Javascript we use a replacement, for no specific method is available for this task as in PHP

custom_string1=custom_string1.replace(/<[^>]+>/g, ”);

PHP

custom_string1=striptags(custom_string1);

==============================

Replace instances in a string

JAVASCRIPT

custom_string1.replace( custom_findThis, custom_replaceWithThis )

custom_string1.replace( custom_regularExpression, custom_replaceWithThis )

PHP

str_replace( custom_findThis, custom_replaceWithThis, custom_string1 );
this function replaces all instances.

preg_replace( custom_regularExpression, custom_replaceWithThis, custom_string1 );

custom_regularExpression must be in between quotes, unlike JAVASCRIPT
“/regexp here/”

PHP

substr_replace( custom_string1, custom_replaceWithThis, custom_fromNumIndex, custom_lengthOfItem );

JAVASCRIPT

custom_string1.replace( custom_string1.substring( custom_fromNumIndex, (custom_fromNumIndex+length) ), custom_replaceWithThis )

=============================

ARRAY MANAGEMENT
Is that an array?

JAVASCRIPT

typeof(custom_array1)==”object”

PHP

is_array(custom_array1)

==================================

Length of an array

JAVASCRIPT

custom_array1.length

PHP

sizeof(custom_array1);

=============================

Join array entries into a string

JAVASCRIPT

custom_array1.join(custom_stringJoiner)

PHP

implode(custom_stringJoiner, custom_string1);

Return length of string

JAVASCRIPT

custom_array1.concat(custom_array2, custom_array3…)

This javascript method will not concatenate associative arrays namely arrays whose indexes are not uniquely numerical.

PHP

array_merge(custom_array1, custom_array2, custom_array3…);

array_merge_recursive(custom_array1, custom_array2, custom_array3…);
This latter php method will concatenate associative arrays too namely arrays whose indexes are not uniquely numerical. From php.net:
If the input arrays have the same string keys, then the values for these keys are merged together into an array, and this is done recursively, so that if one of the values is an array itself, the function will merge it with a corresponding entry in another array too. If, however, the arrays have the same numeric key, the later custom_value will not overwrite the original custom_value, but will be appended.

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Pop, push, shift, unshift on arrays

JAVASCRIPT

custom_array1.shift()
custom_array1.unshift(custom_value)
custom_array1.pop()
custom_array1.push(custom_value)

PHP

array_shift(custom_array1);
array_unshift(custom_array1, custom_value);
array_pop(custom_array1);
array_push(custom_array1, custom_value);

==================================

Reverse an array

JAVASCRIPT

custom_array1.reverse()

PHP

array_reverse(custom_array1);

This function accepts a second parameter, if passed as keyword true the arry is reversed but the indexes still the same.

To reset the indexes of an array in PHP

custom_array1=array_values(custom_array1);

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Slice an array

JAVASCRIPT

custom_array1.slice(custom_startIndex, custom_endIndex)
Original custom_array1 not affected, the sliced subsegment is released as an array of its own.

custom_array1.splice(custom_startIndex, custom_lengthOfItem)

Original custom_array1 is affected. This latter function allows for a third argument, which must be an array: if provided, in the original array the spliced (removed, for original is affected) subsection is just replaced with it.
Note that in javascript the third argument is an index with slice and a length with splice.

PHP

array_slice( custom_array1, custom_startIndex, (custom_endIndex-custom_startIndex) );
Original not affected.

array_splice( custom_array1, custom_startIndex, custom_lengthOfItem );

Original custom_array1 is affected. This latter function allows for a fourth argument, which must be an array: if provided, in the original array the spliced (removed, for original is affected) subsection is just replaced with it.

PHP

array_slice( custom_array1, custom_startIndex, custom_lengthOfItem );
array_splice( custom_array1, custom_startIndex, custom_lengthOfItem );

JAVASCRIPT

custom_array1.slice(custom_startIndex, (custom_startIndex+custom_lengthOfItem))
custom_array1.splice(custom_startIndex, custom_lengthOfItem)

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Sort an array

JAVASCRIPT

custom_array1.sort(custom_optionalFunction)

PHP

sort(custom_array1);
You have a wide family of sorters in php as such:
rsort ; Sort an array in reverse order
ksort ; Sort an array by key
krsort ; Sort an array by key in reverse order
natsort ; Sort an array using a natural order algorithm (what in javascript we called custom_optionalFunction)
natcasesort ; Sort an array using a case insensitive natural order algorithm (what in javascript we called custom_optionalFunction)
usort(custom_array1, custom_optionalFunction) ; Sort an array with a user-defined custom_optionalFunction
uksort(custom_array1, custom_optionalFunction) ; Sort an array by keys with a user-defined custom_optionalFunction
uasort(custom_array1, custom_optionalFunction) ; Sort an array with a user-defined custom_optionalFunction

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NUMBER MANAGEMENT
Is it a custom_number?

JAVASCRIPT

isNaN(custom_number)
returns true if it is not a custom_number. Yet also numerical strings (so called literal numbers, say: “12″) are reported as numbers.

Note that the typeof of a non custom_number returned by isNan is, confusing enough: “custom_number”

PHP

is_nan(custom_number);
is_numeric(custom_number);
returns true if it is not a custom_number. Yet also numerical strings (so called literal numbers, say: “12″) are reported as numbers.

is_integer(custom_number);
returns false if custom_number has floating digits. Literal numbers (in between quotes) return false.
is_double(custom_number);
returns false if custom_number has no floating digits. Literal numbers (in between quotes) return false.

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Convert strings into numbers

JAVASCRIPT

parseInt(custom_string1)
parseFloat(custom_string1)

PHP

(integer)custom_string1;
(double)custom_string1;
The procedure above is called data type casting.

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Round a custom_number, get its absolute custom_value

JAVASCRIPT

Math.floor(custom_number); Math.ceil(custom_number); Math.round(custom_number);

Mat.abs(custom_number);

PHP

ceil( custom_number ); floor( custom_number ); round( custom_number );

abs( custom_number );

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Max and custom_min or random numbers

JAVASCRIPT

Math.max(custom_number1, custom_number2)
Math.min(custom_number1, custom_number2)

(Math.random()*(custom_max-custom_min))+custom_min
custom_min and custom_max are optional. If omitted, this function just generates a fractional custom_number included between 0 and 1. To produce only non fractional numbers you may use:
Math.round(
(Math.random()*(custom_max-custom_min))+custom_min
)

PHP

max(custom_number1, custom_number2);
min(custom_number1, custom_number2);

mt_rand(custom_min, custom_max);
custom_min and custom_max are optional. If omitted, this function just generates a custom_number up to ten digits long.
Prior to Php 4.2.0 you have also to feed the seed by calling first:
mt_srand((double)microtime()*1000000)
just like that!

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Pow and squares

JAVASCRIPT

Math.pow(custom_number, custom_power)
Math.sqrt(custom_number)

Math.pow(custom_number, 1/custom_root)
Above is the x custom_root of a custom_number, for Math.sqrt provides only square roots.

PHP

pow(custom_number, custom_power);
sqrt(custom_number);

pow(custom_number, 1/custom_root);
Above is the x custom_root of a custom_number, for sqrt provides only square roots.

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Trigonometric functions

JAVASCRIPT

Math.sin(); Math.cos(); Math.tan();

Math.asin(); Math.acos(); Math.atan();

PHP

sin(); cos(); tan();

asin(); acos(); atan();

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Constants and logarhitms

JAVASCRIPT

Math.PI; Math.log(custom_value)

PHP

pi();
log(custom_value);

====================================

FUNCTION MANAGEMENT

Return length of string

JAVASCRIPT

typeof(custom_functionName)==”function”; //is it a function?

This must be called inside the function custom_functionName:
custom_functionName.arguments.length;

custom_functionName.arguments; //array of args

custom_functionName.arguments[custom_number];

PHP

function_exists(“custom_functionName”); //is it a function?

This must be called inside the function custom_functionName:
func_num_args();

func_get_args(); //array of args

func_get_arg(Number)