How to replace a particular line in a text file using php?

1. First read the entire content and save in a variable.
2. $content = file_get_contents(‘file.txt’);
3. Replace the string.
4. $content = str_replace(‘text to replace’, ‘new string’, $content);
5. Write back the entire string to the file.
6. file_put_contents(‘file.txt’, $content);

How do I replace a string in a text file?

Find and replace text within a file using sed command

1. Use Stream EDitor (sed) as follows:
2. sed -i ‘s/old-text/new-text/g’ input.
3. The s is the substitute command of sed for find and replace.
4. It tells sed to find all occurrences of ‘old-text’ and replace with ‘new-text’ in a file named input.

How do I replace a word in a string in PHP?

Answer: Use the PHP str_replace() function You can use the PHP str_replace() function to replace all the occurrences of a word within a string. In the following example the word “facts” is replaced by the word “truth”.

How do I remove a word from a string in PHP?

You can used array_diff and then array_values for reset array indexing. input->post(‘keyword’); $string = explode(” “, $string); $omit_words = array(‘the’,’i’,’we’,’you’,’what’,’is’); $result = array_values(array_diff($string,$omit_words)); print_r($result); //Array ([0] => want)?>

How do you replace a specific line in a file using Python?

Use file. readlines() to edit a specific line in text file Use open(file, mode) with file as the pathname of the file and mode as “r” to open the file for reading. Call file. readlines() to get a list containing each line in the opened file . Use list indexing to edit the line at a certain line number.

How do I replace a word in a text file?

Find and replace text

1. Go to Home > Replace or press Ctrl+H.
2. Enter the word or phrase you want to locate in the Find box.
3. Enter your new text in the Replace box.
4. Select Find Next until you come to the word you want to update.
5. Choose Replace. To update all instances at once, choose Replace All.

How can I replace multiple words in a string in PHP?

In PHP there is function str_replace function to replace words. $search is to be replaced with $replace in $string. $count is optional parameter that how many times to be replace. If you need to replace multiple character, pass the first two parameters as array that you want to replace.

How do you remove letters from a string?

You can remove a character from a Python string using replace() or translate(). Both these methods replace a character or string with a given value. If an empty string is specified, the character or string you select is removed from the string without a replacement.

How do I remove a specific word from a string?

C Program to Remove given Word from a String

1. Take a string and its substring as input.
2. Put each word of the input string into the rows of 2-D array.
3. Search for the substring in the rows of 2-D array.
4. When the substring is got, then override the current row with next row and so on upto the last row.

How do you change a line in Python?

In Python, the new line character “\n” is used to create a new line. When inserted in a string all the characters after the character are added to a new line. Essentially the occurrence of the “\n” indicates that the line ends here and the remaining characters would be displayed in a new line.

How do you remove a line from a file in Python?

How to delete a line from a file in Python

1. a_file = open(“sample.txt”, “r”) get list of lines.
2. lines = a_file. readlines()
3. a_file.
4. new_file = open(“sample.txt”, “w”)
5. for line in lines:
6. if line. strip(“\n”) != “line2”: Delete “line2” from new_file.
7. new_file. write(line)
8. new_file.

How do you replace a string in a text file in Python?

To replace a string in File using Python, follow these steps:

1. Open input file in read mode and handle it in text mode.
2. Open output file in write mode and handle it in text mode.
3. For each line read from input file, replace the string and write to output file.
4. Close both input and output files.