How to remove the content after the specified location in php

This article mainly introduces the relevant knowledge of "how php removes the content after a specified location". The editor shows you the operation process through an actual case. The operation method is simple and fast, and it is practical. I hope that this article "how to remove the content after a specified location in php" can help you solve the problem.

Removal method: 1, using the "substr_replace ($str,'', position value)" statement, you can replace all the characters after the specified position of the string with empty characters, and then remove all characters; 2, using the "array_splice ($arr, position value)" statement, you can remove all elements after the specified position of the array.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php implements two ways to remove the content after the specified location is removed:

Use the substr_replace () function

Use the array_splice () function

1. Substr_replace () function

Use substr_replace () to remove all characters after the specified position of the string (just set the replacement value to an empty character)

2. Array_splice () function

Using array_splice (), you can remove all elements after the specified position in the array.

Example: there is such an array:

The contents after deleting the first element of the array

Echo "content after deleting the first element of the array:"; array_splice ($arr,1); var_dump ($arr)

The contents after deleting the second element of the array

Echo "content after deleting the second element of the array:"; array_splice ($arr,2); var_dump ($arr)

The contents after deleting the third element of the array

Echo "content after deleting the third element of the array:"; array_splice ($arr,3); var_dump ($arr)

The contents after deleting the fourth element of the array

Echo "content after deleting the fourth element of the array:"; array_splice ($arr,4); var_dump ($arr)

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