#DynamicArrays

[vinhjacker1]

Filling a PHP array dynamically means that instead of hardcoding the values, you're adding values to the array based on some logic, external input, or data sources. Here's a basic overview and some examples:

1. Create an Empty Array

You can create an empty array using the 'array()' function or the '[]' shorthand.

$dynamicArray = array(); // OR $dynamicArray = [];

2. Add Elements to the Array

You can add elements to an array in various ways:

Append to the array:

$dynamicArray[] = 'value1'; $dynamicArray[] = 'value2';

Add with a specific key:

$dynamicArray['key1'] = 'value1'; $dynamicArray['key2'] = 'value2';

3. Dynamically Filling the Array

Here's how you can fill an array based on various scenarios:

From a database (using PDO for this example)

$stmt = $pdo->query("SELECT value FROM some_table"); while ($row = $stmt->fetch()) { $dynamicArray[] = $row['value']; }

From a form (using POST method as an example):

if (isset($_POST['inputName'])) { $dynamicArray[] = $_POST['inputName']; }

Based on some logic:

for ($i = 0; $i < 10; $i++) { if ($i % 2 == 0) { $dynamicArray[] = $i; } }

This would fill $dynamicArray with even numbers between 0 and 9.

4. Tips and Best Practices

Sanitize external input: Always sanitize and validate data, especially when it's coming from external sources like user input, to ensure security.

Use associative arrays wisely: If you're using string keys, ensure they're unique to avoid overwriting values.

Check existing values: When adding to an array, you may want to check if a value already exists to avoid duplicates.

if (!in_array($value, $dynamicArray)) { $dynamicArray[] = $value; }

Using these methods and principles, you can effectively and dynamically fill a PHP array based on any set of conditions or data sources.

#PHPDevelopment #DynamicArrays #WebDevelopment #ProgrammingTips #DataHandling #PHPArrays #BackEndDevelopment #CodingBestPractices #WebProgramming #DatabaseIntegration #vinhjacker #mageplaza

[theprogrammingassignmenthel-blog]

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#CProgrammingAssignmentHelp ProgrammingAssignmentHelp Debugging CProgrammingHomeworkHelp CfileStructure CreatingLibraries DynamicArrays Cswit

[postgraduatetraining-institute]

Excel: Mastering the Implicit and Explicit Features of Microsoft Excel

3DReferences

AbsoluteReference

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DynamicArrays

ExcelEffects

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[felord]

Project 1 The Art of the Cart Solved

Project 1 The Art of the Cart Solved

  Your objective for this project is to implement a high level shopping simulator. To do so you will use

inheritance to model a class, ShoppingCart , after another class, DynamicArray , that you will modify to make functional. You will proceed to create an abstract Grocery class and to create its concrete children Vegetable , Drink , and JunkFood , which will collectively represent every type of…

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[phungthaihy]

Excel Dynamic Array Formulas http://ehelpdesk.tk/wp-content/uploads/2020/02/logo-header.png [ad_1] In January 2020 Microsoft releas... #arrayformulainexcel #arrayformulas #dataanalysis #datamodeling #datavisualization #dynamicarrayformulas #dynamicarrayformulasinexcel #dynamicarrayfunctions #dynamicarrays #excel #excel2020 #excelarrayformulas #exceldashboard #excelformulas #excelformulasandfunctions #excelfunctions #excelmacros #exceltipsandtricks #exceltipsandtricks2020 #exceltutorial #excelvba #filter #filterfunction #microsoftaccess #microsoftexcel #microsoftexceltutorial2019 #microsoftoffice #microsoftoffice365 #microsoftpowerbi #microsoftproject #microsoftword #office365 #office365excel #officeproductivity #pivottables #powerpivot #powerpoint #randarray #sap #seletraining #sequence #sort #sortby #unique #uniquefunction

[prabasmsoffice-blog]

SORT - Excel Formula using New Calculation Engine - Dynamic Array in Tamil

https://youtu.be/hy_vyeXfb3w

#sort #excel #formula #dynamicArray

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[javaaid-blog1]

Dynamic Array HackerRank Solution | Data Structures | Arrays

#JAVAAID dynamicarray HackerRankSolutions HackerRankTutorials HackerRank JavaAidTutorials programming DataStructures algorithms coding compet

[spthetutor]

Iterative Insertion Sort

#include<stdio.h> #include<stdlib.h>

void swap(int* var1, int* var2); void printArray(int* ptr, int size); void sort(int* ptr, int size);

int main(void){    int size, i; int* ptr;    printf("Enter size of array: ");    scanf("%d",&size);    ptr = (int*)calloc(size, sizeof(int));    for(i = 0; i < size; i++){        printf("\nEnter element %d: ",(i+1));        scanf("%d",&ptr[i]);    }    printf("\nArray before sorting\n");    printArray(ptr, size);    sort(ptr, size);    printf("\nArray after sorting\n");    printArray(ptr, size);    return 0; }

void swap(int* var1, int* var2){    int temp;    temp = *var1;    *var1 = *var2;    *var2 = temp; }

void printArray(int* ptr, int size){    int i;    for(i = 0; i < size; i++)        printf("%d\t",ptr[i]); }

void sort(int* ptr, int size) {   int i, key, j;   for (i = 1; i < size; i++)   {       key = ptr[i];       j = i-1;       while (j >= 0 && ptr[j] > key)       {           ptr[j+1] = ptr[j];           j = j-1;       }       ptr[j+1] = key;       printf("\nPass %d \n",(i));       printArray(ptr, size);   } }

#programming #data structures #sorting #insertionsort #dynamicarray

[hhtoraman]

creating a Dynamic array with a pointer. looks cool

this little code text in C++ i wrote it before, i guess last year, first year in c++. within i create a pointer which address an array created instantly. and this array got a size, so we can change easily. look belove and enjoy it:

#include<iostream> using namespace std;

int main(){ int size; cout<<"Plealsse enter how big array you need: "; cin>>size;

int *array=new int[size];

for(int i=0;i<size;i++) cin>>array[i];

for(int i=0;i<size;i++) cout<<array[i];

delete[] array;  return 0; }

#dynamicarray

[phungthaihy]

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[phungthaihy]

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[spthetutor]

Iterative Bubble Sort

#include<stdio.h> #include<stdlib.h>

void swap(int* var1, int* var2); void printArray(int* ptr, int size); void sort(int* ptr, int size);

int main(void){    int size, i; int* ptr;    printf("Enter size of array: ");    scanf("%d",&size);    ptr = (int*)calloc(size, sizeof(int));    for(i = 0; i < size; i++){        printf("\nEnter element %d: ",(i+1));        scanf("%d",&ptr[i]);    }    printf("\nArray before sorting\n");    printArray(ptr, size);    sort(ptr, size);    printf("\nArray after sorting\n");    printArray(ptr, size);    return 0; }

void swap(int* var1, int* var2){    int temp;    temp = *var1;    *var1 = *var2;    *var2 = temp; }

void printArray(int* ptr, int size){    int i;    for(i = 0; i < size; i++)        printf("%d\t",ptr[i]); }

void sort(int* ptr, int size){    int i, j;    for(i = 0; i < size - 1; i++){        for(j = 0; j < size -i - 1; j++){            if(ptr[j] > ptr[j+1])                swap(&ptr[j], &ptr[j+1]);        }        printf("\nPass %d \n",(i+1));        printArray(ptr, size);    } }

#programming #sorting #bubblesort #dynamicarray