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How do I format output in PHP using printf() or sprintf()?
Article Introduction：PHP's printf() and sprintf() functions provide fine control over variable display through format specifiers. printf() directly outputs the formatted string, while sprintf() returns the string for subsequent use. The format specifier includes optional parameter index, flag, width, precision and type, such as %d represents an integer and %.2f represents a floating point number that retains two decimal places. Common use cases include numerical formatting with padding and precision, text alignment, and reuse of parameters in different orders. Notes include ensuring that the format specifier matches the number of parameters, avoiding data truncation caused by type mixing, and prioritizing the use of special functions to handle localized values. Example: printf("d",7)
2025-06-29
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454
PHP sprintf format examples
Article Introduction：The sprintf() function in PHP is used to format strings and return results. 1. Format numbers to be formatted as fixed decimal places, you can use %.2f, %.1f and other formats to automatically round; 2. Complement and width control can be implemented through d or M, indicating complementary or fill spaces respectively; 3. String truncation and splicing use %.10s or .10s to limit length and alignment; 4. When using multiple parameters in a mixed manner, %s, %d, and %f correspond to strings, integers, and floating-point numbers, respectively, and the order must be consistent. This function is very practical in generating logs, reports and other scenarios, making the code more neat and controllable.
2025-07-11
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839
Advanced String Formatting Techniques with `sprintf` and `vsprintf`
Article Introduction：sprintf and vsprintf provide advanced string formatting functions in PHP. The answers are: 1. The floating point accuracy and %d can be controlled through %.2f, and the integer type can be ensured with d, and zero padding can be achieved with d; 2. The variable position can be fixed using positional placeholders such as %1$s and %2$d, which is convenient for internationalization; 3. The left alignment and ] right alignment can be achieved through %-10s, which is suitable for table or log output; 4. vsprintf supports array parameters to facilitate dynamic generation of SQL or message templates; 5. Although there is no original name placeholder, {name} syntax can be simulated through regular callback functions, or the associative array can be used in combination with extract(); 6. Substr_co
2025-07-27
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577
Working with Strings in PHP
Article Introduction：PHP often uses dot styling, sprintf formatting, strpos search, str_replace replacement, trim cleaning, htmlspecialchars anti-XSS, and urlencode encoding. 1. Use . or sprintf() for splicing; 2. Use strpos() for search, and replace str_replace() for str_replace(); 3. Use trim(), strip_tags(), and htmlspecialchars() for cleaning; 4. Use mb_convert_encoding() for encoding and conversion, and use urlencode()/urldecode() for URL encoding and decoding.
2025-07-15
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833
How to Add Hours to a Date in PHP?
Article Introduction：Add Hours to Date with PHPTo manipulate dates and times in PHP, you can utilize the date(), strtotime(), and sprintf() functions. Here's how you...
2024-11-04
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